Can I play basketball with these blisters?

Question:
Hi MyRunningDoc!

I have a basketball game tomorrow. Can I play basketball with these blisters without causing any problems?   What can put on it while I play?

Thanks!
JM

Answer:
Blisters under the ball of the foot can be painful. In the images above you can see that JM has developed some large blister that cover the entire big toe joint area. The blister may have started draining, or maybe he simply decided to pop and de-roof (meaning cut the blistered skin off) the blister in order to relieve the pressure. With large blisters, it is often necessary to drain blisters ton keep them from getting bigger. Yet doing so can make them more painful and take longer to heal.

In this case the raw pinkish area is going to be painful when running. Suddenly stopping or changing direction will also put a lot of stress on the blistered area and aggravate the raw skin under the big toe joint.

When you run, about 50% of you body weight is transmitted through this area. There are really only two ways to decrease the pressure to the ball of the foot at the big toe joint.

1. Decrease your activity (as in no basketball, walk less, etc.).
2. Move the pressure somewhere else. 

It is a simply rule of physics: you cannot remove pressure, but you can transfer it. It is possible to create a pad that moves the pressure from the big toe joint to the rest of the ball of the foot. By moving much of the pressure and irritation to the little toe joints, it may possible to play with less discomfort.

 

You can purchase pads at any drugstore that are designed for the ball of the foot. The idea is to hold the pad on the foot and identify the painful area. Clear pads obviously make this easier.

 The painful area is outlined on the pad.

The outlined area over the blister is cut away.

The pad now can put more pressure on healthy skin under the ball of the foot. The pad may stay in place well with a sock on. If not it can be taped in place to secure it. If properly placed, there will be less pressure on the blistered area. 

Even if properly offloaded, there is a risk that continuing to play will further erode the skin and cause more discomfort. In the end, if continuing to play on a de-roofed blister, it will take longer to heal. The increased mechanical irritation of running increases the chance of the blistered area becoming infected.

With any de-roofed blister (or other open wound) it is always best to seek an evaluation from your own physician before attempting treatment. You should speak with a sports medicine podiatrist to make sure that the blisters heal properly. You also need to identify the cause so that it doesn't happen again.

Dr. Christopher Segler, DPM is a podiatrist, Board Certified, American Board of Podiatric Medicine. He is also a 12-time Ironman Triathlon finisher. His sports medicine practice caters to athletes He sees patients in person in San Francisco, Houston, and Hawaii. He also offers remote consultations via webcam to athletes living abroad. If you have a sports injury question and are trying to figure out how to keep running, you can reach him directly at 415-308-0833. You can also learn more about blister causes and treatment at AnkleCenter.com and DocOnTheRun.com



 

Heel Blister: To Pop or Not To Pop?

 

Hi Dr. Segler,

I've had this blister on my heel for the past three days and it has gotten slightly larger.  I'm wondering if I should allow more time for it to heal or pop, drain, etc?  What's the fastest way to get it healed?

Sincerely,
Ryan M. 
San Francisco, CA

Answer:

Hello Ryan,

A blister on the inside of the heel can be painful when running or even walking.  If you are currently training for a marathon, the last thing you want to do is stop running just because you have a blister on your heel.  But obviously the blister has to stop getting bigger before it is going to heal.

There are only a couple of reasons that a blister continues to get bigger.

1. Friction. If you are continuing to rub the inside of the heel in the same way that cause the blister to form in the first place, the blister will continue to get bigger.

2. Compression. If you repeatedly press on the blister,  the fluid with in the blessed blister will try to disperse outward. Since the fluid is all contained inside the blister, this will continue to separate the layers of the skin from the pressure applied to the blister when the fluid tries to move. This causes the blister to continue to enlarge.

The redness at the border of blister tells me that the fluid is being compressed and further separating the layers of the skin (indicated by red arrows). This of course hurts and makes the heel blister bigger.

If you pop or drain the blister, it will increase the risk of infection. If you pop (or drain) the blister it will feel slightly better in the short term, but it might take slightly longer to completely heal.  As long as all of the irritation to the blister is removed, your body will resorb the blister fluid and heal the blister.

The blister in these images appears to be flat enough that it could be offloaded with some simple pads that could be obtained from a local pharmacy.  The idea is to place felt pads around the blister. By removing the pressure that is being applied to the blister when you walk, it will stop enlarging and it will start to calm down.

If a pad is applied to the heel, it will place all of the pressure around the blister, instead of on the blister. This will significantly decrease both the compression and friction of the blister.  If the oval pads that you find at the pharmacy are not large enough, you can simply cut two of them in half and then apply two separate half-oval pads to completely surround and protect the blister.

Here is an image of the proper pad placement with the red area indicating a blister:

Once the blister has completely healed your next task will be to identify the cause of the blister.  Obviously will not want this to happen again. If you have just gotten a new pair of shoes you want to make sure to break and then more gradually the next time. If your shoes were to loose, obviously want to tie them slightly tighter so that your heel isn't sliding around inside the running shoe. And if the blister happened after running a race (where you were dumping water on your head to stay cool) or from running in the rain, you want to make sure that you avoid getting your feet as wet the next time.

Heal that heel fast so that you can get back to running!

Dr. Christopher Segler, DPM is a runner, 11-time Ironman triathlon finisher and is Board Certified,  American Board of Podiatric Medicine.  His practice is limited to runners, triathletes and other active young adults. He travels frequently lecturing to other physicians at podiatry conferences about the treatment of complicated running injuries.  He performs remote consultations for runners all over the world via telephone and Skype. He also sees patients in person in both San Francisco, CA and Houston, TX.  If you have a question about a running injury that doesn't seem to be getting better, you can reach him directly at 415-308-0833. 

Marathon Blister. Should I pop it?

Question:
Hi MyRunningDoc!


I have been reading your site. This blister formed on my heel yesterday. It is huge and painful. I am running in the Avenue of the Giants Marathon on May 5, 2013 and really can't take a break from marathon training. Should I pop it?

Thanks!
W.H., San Francisco CA

Answer:
Thank you for your inquiry! That is certainly a Giant of a marathon blister. I can see how that would hurt and put a damper on your final marathon training.

There is always an advantage and a disadvantage to draining in any blister on the foot that pops up during training.

With a blister that large and a marathon that close, it is unlikely that you would be able to run the marathon without significant pain. In fact the blister is so big it would probably pop during the marathon anyway.

With most small blisters, it is typically better to let them go away on their own. If you do not drain a small blister and can keep it from getting rubbed when you are running, the fluid will gradually recede and the blister will re-adhere. It will eventually peel away revealing healthy skin underneath. It is also the least likely to get infected because you don't open the blister allowing bacteria to get inside the skin.  This actually will heal the fastest and is the safest approach.

Things get tricky when a running blister on the foot gets big.

When you have a big running blister that causes a great deal of discomfort when you run, it actually hurts because the fluid is getting pushed and compressed.  If you step on a water balloon, the balloon will squish outward under your foot. The balloon will push out and stretch as far as it can unless it pops.

So when you run on a blister like this one pictured here, the blister fluid actually pushes and continues to separate the layers of skin at the edge of the blister. This of course causes more irritation and more fluid accumulation, making the blister even bigger as you continue to run.  The only way to stop this process is to stop irritating the blister on the foot. One way to do this of course is to stop running.

If you can pad the blister and keep the pressure off of it you might be able to continue training without the blister getting any bigger.  That would be hard to do given the location of this blister on the inside of the foot and heel. It will be almost impossible to remove all the pressure from the heel inside the running shoe.

If you pop the blister, it will hurt more for the first day or two.  You can decrease the amount of discomfort by using moleskin or another type of blister cover that will stop the friction from rubbing the overlying skin. It may also be helpful to put some padding around the blister in order to decrease irritation.

If you decide to pop your blister, it is always best to drain the blister by making a small hole at the bottom edge of the blister down toward the bottom of the foot so that the fluid will continue to drain downward and out of the blister as it re-accumulates. Typically some more blister fluid will accumulate inside the blister for several days after you pop it.

The skin on the top of the blister is not what is painful. It is the skin underneath. Some people start to drain the blister and realize this and then trim off the entire top of the blister. If you are to do that in this case, it would leave an open sore about the size of a half dollar. This would of course leave an enormous raw spot that would be very painful whenever you run during training. You foot would be killing you during the marathon.

In these types of cases it is often better to simply drain the blister and leave the top of the blister intact to function as a biologic dressing. This will take slightly longer to heal than if you don't drain the blister.  However this assumes that you are of course going to continue to run, train and complete the marathon that you have planned.

It would be best to be evaluated in person or by a podiatrist or arrange a remote consultation with a running injury expert in order to get more detail, before making your final decision.  You can also learn more about blisters from running by clicking here.

Dr. Christopher Segler, DPM a marathon runner, podiatrist and 10-time Ironman Triathlon finisher who is is Board Certified, American Board of Podiatric Medicine.  He believes the best podiatry practice combines cutting edge technology with the old-school convenience of house calls. He makes podiatry house calls for runners in San Francisco, CA and Houston ,TX. He also does remote consults for runners who live outside of the United States. If you have a question, you can reach him directly at 415-308-0833. You can learn more about running injuries at www.DocOnTheRun.com 

Should I drain a liquid nitrogen wart blister?

Question:

I got a blister when I recently tried the liquid nitrogen treatment to freeze a wart on my foot. It is tender and so I stopped running. Should I try to drain the blister so I can run?

Answer:

The idea with treating a wart with liquid nitrogen is in fact to cause a blister. The way this treatment works is that when liquid nitrogen freezes the skin fluid collects between the dermis and the underlying subcutaneous layer of the skin creating the blister. The blister separates the skin layers. Here is how it cures a wart...

The wart is a thick callus covering an encapsulated collection of viral wart particles, which is within then the living layer of skin called the dermis. By creating a blister beneath the dermis (under the wart) the wart essentially gets lifted off of the underlying skin as the blister swells up.

The fluid within the blister will resorb over the next several days. As the blister heals and flattens out, it forms a scab-like structure that doesn’t fully re-adhere to the tissue underneath. Eventually the dried up skin of the blister peels off, and the wart goes with it. If all goes according to plan, you are left with new healthy skin underneath. 

There are many different blistering agents that can be used to cure plantar warts. Here are three of the most common wart treatments that work by blistering:

Liquid Nitrogen - creates a blister with a carefully placed frostbite-type injury. 

Bleomyocin - is a chemical blistering agent injected directly into the wart.

Canthacur - is a topical chemical blistering agent applied to the surface of the wart.

As every runner knows, blisters on the feet can be irritating enough to force one to limit their run mileage or stop running altogether. So it is not surprising that a runner may consider popping a painful blister to lessen the discomfort, promote healing and get back to running. 

This may be a reasonable strategy with friction blisters sustained during a marathon or other long run. But not so with warts treatment blisters.

The problem with warts is that they are caused by a viral infection of the skin. If you poke a needle through the blister (and through the wart containing all of those viral particles) you just might seed the surrounding healthy, non-infected skin with the wart virus. In this way, by attempting to drain the blister under the wart, you may actually infect other areas of the foot and cause a new wart to start growing nearby. 

Then, after the original wart (and its associated treatment blister) have gone away, you may have a brand new nasty little wart rearing its ugly head. Then you have to repeat this process all over again.

Another issue is that the fluid inside the blister is sterile. As soon as you poke a hole the blister fluid can drain out, but bacteria can also get in. So when you pop a blister the risk of bacterial infection goes up. 

If you have a wart that is being treated by a podiatrist, and the blister is large enough to interfere with your activities, you should follow-up with the treating physician. After all the doctor is being paid to treat the wart, so let the doctor finish what he started. Let your podiatrist decide whether or not to drain the blister, and do the draining if needed. That is the safest way to remedy the blister AND make sure that there isn’t any risk of causing a bigger problem long-term.

Heal fast and get back to running! 

Dr. Christopher Segler is a podiatrist who focuses on the rapid treatment of running injuries. He is a runner himself and 10-time Ironman Triathlon finisher. You can learn more about warts, blisters and running injuries at AnkleCenter.com and DocOnTheRun.com  If you have a question about a running injury, you can reach him directly at 415-308-0833.

To Pop or Not To Pop: Blister treatment for runners explained by San Francisco's Running Podiatrist

Dr. Oz recently ran a segment on his television show instructing his audience to pop blisters whenever they occur on the feet. He went on to explain that if you successfully get all of the fluid out, the top layer of the blister will form a adhere down to the tissue underneath and create a "biologic dressing."

While this may be sound advice for a typical healthy woman who gets a blister from a new pair of high heels, the real question for Bay Area runners is: "Should I drain a blister" if I am a runner training for a race such as a marathon or triathlon?

The best answer is "sometimes you should, and sometimes you shouldn't."

The medical term for the type of blisters on the feet when running are "friction blisters." Blisters on the feet occur from a combination of skin friction and pressure. When your foot slides around inside the running shoe, you get friction. Rubbing the skin over and over in one spot (such as the back of the heel or ball of the foot) causes the layers of the skin to begin to separate. Fluid then seeps into this newly created space between the layers forming the blister.

Keep irritating the area and the blister continues to get bigger. Even if you simply continue to apply pressure to the blister (like pressing it against the heel counter inside the running shoe) it will continue to get bigger. This is because the fluid will try to spread outward and keep separating the skin layers. Then even more fluid seeps in to make the blister bigger.

If you keep rubbing the blister long enough, the skin on the top of the blister will tear effectively popping on its own. The blister then starts to ooze relieving the pressure as the fluid leaks out. So should you take charge and drain it yourself?

What sports medicine podiatrists know about blisters in runners is:

1) small non-painful blisters heal quickly
2) large painful blisters hurt less if drained and not irritated, but hurt more and have a slightly higher risk of getting infected if they are drained and the activity (such as running) is continued
3) blisters with the overlying blister roof removed will heal, but hurt more initially

So If you are runner with a small blister on a toe and it doesn't hurt don't drain it. It will heal quickly and has a very low risk of infection. If the fluid can't drain out, bacteria can't get in. If you have a blister that is small, put a felt pad around the blister. You need a donut shaped or U-shaped pad for this to work. You need to put the pressure around the blister and not on the blister. This will stop all of the rubbing that could make the blister get bigger. It will also stop the blister from hurting.

If you running a marathon or competing in an Ironman triathlon and get a huge blister that makes it hard to walk after the race, drain it. You can do this by poking a small hole at the edge of the blister. Heat the needle or soak it in rubbing alcohol. This will sterilize the needle so that you don't introduce any infection causing bacteria when you puncture the blister.

Cover the blister with a bandage that will soak up the fluid as it continues to leak out. If the fluid starts to build up again, then repeat this process and drain the fluid again. Marathon runners with big blisters may have to do this a couple of times. The blister can be quite irritated after running 26.2 miles.

So what are the "exceptions to the rule" about popping or draining blisters in runners?

1. If you notice the blister at mile 13.1 and still have another half-marathon to go, don't pop the blister. This is where the advice from Dr. Oz doesn't fit with runners. If you drain the blister on your heel then continue to run, more fluid will seep under that skin. The skin will slide back and forth. If the drained blister skin slides around, it can't work as a "biologic dressing" because it never has a chance to stick to the underlying raw area. The roof of the blister may also tear. That is what happened in the blister pictured above. All of the rubbing of the heal inside the running shoe caused the blister to rip open. If the roof of the blister tears, it needs to be removed (called "de-roofing" by podiatrists).

If the blister is drained, you need to secure the overlying skin in place with a dressing. Wait until the race is over. If you drain it mid-race it will hurt like hell, there is a higher risk of infection and it will take longer to heal. You also need to wear a pair of shoes that won't rub on the raw blister after it has popped. So once you drain the blister, apply a dressing that will hold the skin securely in place. Change the dressing daily. Studies show that hydrocolloid dressings works best to bake blisters heal fastest. But there is NO evidence than antibiotic ointment helps blisters heal any faster.

2. All blisters should be drained, completely de-roofed and treated by a podiatrist if you are diabetic. The risk of infection is much higher in diabetics. A blister anywhere on the foot in a diabetic runner is a medical emergency. I have personally performed many amputation on diabetics where a blister became hugely infected and spread to the underlying bone. Seek immediate medical attention if you have diabetes and a blister anywhere on the foot, heel or toes.

Although it is easy to prevent blisters, they still often occur in runners. In fact research shows that blisters on the feet are by far the most common running injury reported among marathon finishers. If you get a blister on the feet, treat it right and it will heal quickly so you won't have to miss much training at all.

Dr. Christopher Segler is a sports medicine podiatrist in San Francisco with a focus on runners. He is also a marathon runner and Ironman triathlete himslef. He makes house calls all over the Bay Area to treat running injuries like blisters, stress fractures and Achilles tendonitis. If you have a question about a running injury you can email him or call (415)-308-0833 to reach him directly. For the best source of running injury prevention information in the San Francisco Bay Area, visit MyRunningDoc.com or AnkleCenter.com.