(HealthDay companies News) — Blisters occur when friction on the skin causes fluid to build up between the skin’s layers. They often spring up during strenuous exercise or during use of new equipment, like new shoes. But blisters can be avoided.

Even if shoes are new, they shouldn’t cause blisters if they fit well, the Web site sportsinjuryclinic.net advises.

It suggests taping areas that are prone to blistering, such as the back of the heel. Feet should be kept clean and dry, and socks should be changed regularly.

If additional friction drains the blister, it should be immediately cleaned with a sterilizing wipe and covered to prevent further injury and possible infection, the site advises.