Consistently high blood sugars, as in poorly controlled diabetes, may cause the eruption of blisters on the feet and toes. Blisters are small pockets of liquid that form on the outer layer of the skin after the skin becomes damaged (usually caused by forceful rubbing or burning).
Blisters prevent the area from becoming further damaged by protecting the skin underneath and giving it adequate time to heal. Blisters are filled with serum, which is essentially blood plasma without fibrinogens (the red blood cells and clotting agents are removed).
A blister can form on any part of the body, but the most common parts are the feet and hands.
Friction blisters are more likely to develop in skin areas with a thick horny layer held tightly to the underlying structures, such as the soles of the feet or the palms of the hands. Friction or rubbing on the skin - intense friction or rubbing on the skin can result in the formation of a blister if it continues for long enough. Exposure to chemicals - when the skin comes in contact with chemicals found in detergents and solvents blisters can develop. Wearing comfortable shoes and using socks that can manage moisture can prevent blisters from developing on the feet, particularly among those who sweat a lot - sport socks help keep the feet dry.

Using a protective layer of padding and using a friction management patch applied to shoes also help prevent blisters. Blisters caused by sunburn can be prevented if you apply a good sunscreen, wear protective clothing (including a hat), and limit your exposure. Antiperspirants with emollients and drying powders applied to the feet do not reduce the risk of developing friction blisters. According to the National Health Service2, UK, you should not peel off the dead skin on top of the blister if it bursts. If the top layer of dead skin has already rubbed off the burst blister, do not try and peel any of the remaining skin. Blisters may be caused by disease conditions, injuries or contact dermatitis such as poison ivy.
Symptoms include odor, redness, itching and blisters, most often between the toes and on the bottoms of the feet. Burns on the feet are more common in children and may result from scalds, stepping on lit fireworks or cigarettes, or stepping in hot ashes that appear cool on the surface. However, some blisters may be filled with blood (blood blisters) - if they become infected or inflamed they can also be filled with pus.

Blisters that arise from second degree burns typically manifest themselves almost immediately after the skin becomes damaged, whereas those that develop because of first degree burns tend to appear a couple of days after the skin damage. If blisters on the foot are painful and interfere with walking, they may be punctured and drained, using sterile technique. Though large, they are painless and self-limiting, healing without treatment in about three weeks, according to the American Diabetes Association. Exposure to certain blister agents, such as mustard gas, can lead to severe and large blisters.
Hydrocolloid dressings, which can be bought OTC (over the counter) in pharmacies, help protect the burst blister from infection. Walking long distances without shoes may cause the bottoms of the feet to become blistered from wear, rough surfaces or extreme temperatures. The rash and other symptoms clear up without treatment in seven to 10 days, according to the Centers for Disease Control and Prevention.

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Category: Swollen Feet

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