Tight or stiff shoes that rub against the skin of your feet can cause painful blisters. Sports Injury Clinic explains blisters are a common problem that results from friction causing the outer layer of your skin to separate from the inner layers.

Blisters are commonly caused by friction from tight shoes, herpes, chicken pox, poison ivy and allergic reactions. More uncommon are disorders that only cause blisters on the hands and feet. See your doctor for an accurate diagnosis if you have blisters on your hands and feet, particularly from an unknown cause.

Blisters form when there is a separation in the upper layers of the skin. Fluid collects where the skin layers have separated, forming a bubble -- the blister. As the name implies, a blood blister has some blood within the skin bubble caused by injury to tiny blood vessels in the skin.

Blisters in and around the nose are extremely painful and can quickly become infected. When children develop nose blisters, they require medical care to determine the precise cause. Although the blisters are frequently caused by mild infections, they don't normally indicate a serious underlying condition.

A growth near or under your fingernail can develop from a variety of ailments and skin infections. While many blister-like growths are diagnosed as minor infections, it is possible you are suffering from a more serious ailment, such as skin cancer. Consult your doctor for a diagnosis of your condition.

The painful, blistering skin rash commonly known as shingles is caused by the varicella-zoster virus, the same one that brings on chickenpox in childhood. Also known as herpes zoster, shingles occurs most often in people over 50, reports MedlinePlus, but anyone who has had chickenpox is potentially at risk.

Blisters, a raised pouch of skin filled with fluid, are typically the result of friction on your toddler's skin, but they're also sometimes a side-effect of severe diaper rash and other contact-related dermatitis. Not only are blisters painful, but they're virtual magnets for germs and bacteria, leading to infection.

Blisters are a common ailment of the hands, which can be a result of friction-related damage, or burns. It is important to try to keep the skin over a blister intact, as this will help prevent infection and further skin damage.

Blisters are painful. For the competitive or recreational runner, even a small blister can turn a record-breaking race into a slow, uncomfortable walk. Caused by friction, blisters can be the result of new shoes, improperly laced shoes, wet, sweaty socks or hot and humid weather.