If you have blisters, consult a doctor for a correct diagnosis because different types of blisters require different treatments. Chafing and friction cause skin blisters on various parts of the foot, including the metatarsal region. The metatarsals are five long bones running from the mid foot to the base of the toes. Internal metatarsal blisters affect the bones directly. If you suspect bone blisters, seek medical advice before exercising. Prevent skin blisters by purchasing shoes that fit properly.
Definition
Runners commonly develop blisters on the skin's surface. Bone blisters are rare, internal lesions. Bone blisters are a sign of a more serious condition so seek medical advice for exercise and shoe recommendations. Skin blisters on the arch of the foot result from the first metatarsal rolling inward and bearing too much pressure. Prevent blisters by wearing shoes that provide cushioning and support while allowing your foot to move naturally.
Arch Support
Purchase shoes with proper arch support to prevent metatarsal blisters. If your first metatarsal rolls in too much, you may be over-pronating. Over-pronation results from weak arches or flat feet. By purchasing shoes with good arch support, you decrease the inward rolling motion of your foot and help prevent blisters. If you under-pronate or have high arches, purchase shoes with more cushioning and less arch support. Wearing shoes with excessive arch support also leads to blisters in some people.
Sizing
Choose the right shoe size to prevent chafing and blisters. Shop for shoes in the middle of the day when your feet are slightly swollen from walking. Shoe size fluctuates during adulthood so measure your feet before trying on shoes. If one foot is larger, purchase the larger shoe size. Try on shoes while wearing the same type of socks you wear while running.
Considerations
Prevent blisters by choosing flexible, but supportive shoes with cushioned insoles. Stiff shoes may hinder natural foot movements and cause excess friction. Purchase shoes with enough space for you to wiggle your toes. Do not purchase shoes with seams that may cause chafing. Straighten out wrinkles in your socks before running. Apply a skin lubricant or moleskin to any chafed area to help prevent blisters.
References
- Brian Mac Sports Coach; Runner's Foot Injuries; Larry McDaniel, et al.; 2009
- MayoClinic.com; Blisters -- First aid; Mayo Clinic Staff; January 2010
- Segen's Medical Dictionary; Blister of Bone Sign; 2011
- "The Runner's Repair Manual"; Murry F. Weisenfeld, et al.; 1980



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