A blister is a small pocket of fluid that forms on the skin. Blisters can be caused by a variety of factors, including friction, burns, frostbite, and certain medical conditions. They typically appear as raised bumps on the skin, and the fluid inside can range from clear to yellowish in color.
The most common cause of blisters is friction. This can occur when the skin is rubbed repeatedly against a surface, such as when wearing ill-fitting shoes or using tools without gloves. Burns, such as those caused by hot liquids or sunburn, can also result in blisters. Other causes of blisters include infections, allergies, and medical conditions such as herpes simplex virus and chickenpox.
Symptoms of blisters include pain, tenderness, and swelling around the affected area. In some cases, the skin may become red and inflamed, and the blister may burst, releasing the fluid inside. Blisters that are caused by infections may also be accompanied by fever, chills, and other symptoms.
Treatment for blisters depends on the underlying cause. In most cases, blisters will heal on their own within a few days to a week. It is important to keep the blister clean and dry to prevent infection, and to avoid popping or draining the blister as this can increase the risk of infection. In some cases, a healthcare professional may need to drain the blister or prescribe antibiotics if an infection is present.
To prevent blisters from forming, it is important to wear properly-fitted shoes and clothing, and to use gloves when using tools or performing manual labor. Applying protective padding, such as moleskin or a blister bandage, to areas that are prone to blisters can also help prevent them from forming.