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Blisters are the fluid-filled lesions that occur as a result of the burning or the persistent irritation or friction. Due to burns or friction the outer layer of the skin gets separated from the inner layer, the space between these layers gets occupied by the fluid. This causes the formation of the raised fluid filled areas called blisters. Intact blisters still provide the natural barrier but the ruptured ones are vulnerable to infection.

You might have experienced the foot blisters because of the improper fitting of the footwear. So one of the causes of blisters is, the use of the improperly fitting foot wears; either too large or too small to occupy your feet.

The prevention of the blisters related to the foot wears includes the correct selection of the shoes and socks.

First aid for the blisters:

Any ways, what to do if you have blisters? What first aid measures will you take for the blisters?

Assess whether it is painful or not? If not painful, better not to break it; leave it intact.

It is necessary to air the blisters, so either you can use the moist absorbent, porous gauze material or leave the wound uncovered at night to air.

If it really causes pain, blisters can be ruptured and the fluid drained out which relieves the pain.
To break the blisters, either you can visit your physician or on your own you can do it, if you are confident enough:

First of all, clean the blisters and the overlying skin with soap and water gently.

Apply antiseptic lotion or spirit (cleaning alcohol) on the blisters. Let it dry.

Take a sterile needle and puncture the several points near the edges of the blisters.

Let the fluid to drain out; keep the remaining skin in place for few days to allow it to become dead. (prevent this skin from infection, as it is more prone to infection.)

Apply some antibiotic preparation and cover the area with gauze absorbent material; prevent infection by keeping the area clean daily.

The overlying skin will become dead or necrosed after several days; then  it should be debrided(cut off) by some doctor. Cover the wound area with bandage.

Seek medial advice to treat the blisters, if you are a patient of diabetes mellitus.

This site provides you with the general guidelines and information regarding the first aid measures for the various conditions or health related problems. It is not a substitute for the medical advice or the formal first aid training. It will not be responsible or liable in case one tries to make diagnosis based on the provided information. You always need to consult the doctor and emergency department in case of all the serious emergencies rather than just relying upon the supposed guidelines.