Causes: Blisters are caused by repetive rubbing on an area of skin. This irriation causes the two layers of skin to separate and the space of area in between the two layers fills with fluid. In runners, blisters are usually caused by a sudden increase in activity and are also associated with a change in running footwear.

Treatment: The size of a blister determines how the blister can be treated. A small blister, less than 5mm in diameter, will go away on its own. Blisters that are a little larger can be treated with the application of waterproof tape. The tape will allow the blister to heal without being irritated while running. Once the blister has disappeared, the tape can be removed. For blisters that are significantly larger than 5mm, a sterile needle is needed to pop the blister. Once the shield has been broken, the fluid inside is released and the second layer of skin in exposed. In order to heal this layer of skin, the skin needs to be wrapped tightly until the skin forms a new layer. In addition to this, soaking the foot in warm water mixed with mineral salt will dry up the exposed skin and speed up the process of healing.

Prevention: The best way to deal with blisters is to not get them in the first place. Blisters can be avoided by wearing properly fitted running shoes and keeping skin on the foot well lubricated. If a runner feels a sore spot forming on the skin, a blister can be prevented by applying glycerol gel and a bandaid before running.

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