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Blisters from running: To pop, or not to pop.

Is it normal to get blisters from running? Well, obviously blisters aren’t normal, but maybe it’s ok from picking up the pace a bit? Right? Very similar to the person who has lost half of their toenails and says, “I just ran a marathon! What do you expect for 26 miles!” (I will leave the nail injuries for another post).  To answer the question, no.  Blisters should not occur regardless of how far you ran.

Our body is amazing in that it has a built in protective mechanism known as pain. Pain is usually the first sign we are experiencing something wrong, or about to become wrong. When a blister occurs, it is preceded by a warming or burning effect to the skin or tissue where abnormal pressure or friction is being applied. Many times this can be subtle to a runner, but is noticeable. The pain may then decrease if the running continues as we experience an intolerance. At this point the blister begins. A disruption between the epidermis and dermis begins and fluid starts to invade this space. If the activity continues or the pressure is severe enough, bleeding can occur as the capillaries become ruptured. This is sometimes referred to as a “blood blister”.  Continued activity at this point will probably create a rupture of the epidermis causing a release of the fluid and blood. This is actually a good thing. Consider that if the pressure is not released, it can continue to accrue and cause damage to the underlying tissues resulting in more severe injury.

So what should we do when we take off our shoe and encounter this? The pressure needs to be released and this is done by first puncturing the epidermal layer of the blister (outer skin).  Try to puncture in a manner which allows gravity to let the fluid flow into a gauze pad held below it.  This can be accomplished with a needle or manicure scissors after sterilizing by wiping with isopropyl alcohol.  The key is to remove the outer layer of the blister to reduce the pressure and allow for the underlying skin to heal.  Initially this skin may be tender and “burn” but can be treated with triple antibiotic ointment and an outer covering such as a bandaid or gauze.  Warm soapy water is all that is needed to wash the blister.  Soaking can be performed if there is debris in the wound, but is not needed (soaking for 15-20 minutes can help clean out the debris with less pain).

Blisters will heal with rest.  Usually running can resume after 48-72 hours, or even faster depending on the severity of the pain.  The key is to find out what created the pressure.  In most cases it is poor form combined with ill fitting shoes.  Blisters are not normal, even in marathoners!!!

The loose skin should be cut away with care taken not to pull and disrupt the healthy skin.
This blister should be drained and the covering should be removed.
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