Allergic reactions, drug reactions, certain cancers, and inflammatory conditions
Severe skin swelling, especially of the legs
Factors that increase your chance of getting blisters include:
Wearing ill-fitting shoes
Repetitive work with hand tools
Getting a sunburn
Symptoms may include:
Fluid-filled bump on the skin, which is often round
Fluid is usually clear, but may be bloody
You can diagnose a blister by its appearance and by the activity you were doing when it appeared. Seek medical attention if the blister is unusually painful, appears infected, or occurs with a burn.
A blister will often heal without treatment. Some general tips for treatment include:
Protect the Area
Be gentle with the injured area. To prevent further injury, put a bandage over the affected area. The blister should begin to shrink in about seven days.
Do not pop or lance the blister. Opening the blister increases the chance of infection and delays healing.
In the case of poison ivy or a viral infection, do not scratch the blister. If necessary, call your doctor for medicine to relieve any itching or discomfort.
Wash the Area
If the blister is closed, wash the area with soap and water. Apply a bandage to protect it. If the blister is open, wash the area, apply an antibiotic ointment, and then cover it with a sterile dressing or bandage.
See Your Doctor If:
A blister usually heals by itself. See your doctor if:
The blister is unusually large (for example, bigger than a nickel)
The blister is in a critical area, such as on the face or the groin
The blister is associated with a burn
There are signs of infection, such as increasing redness around the blister, red streaks, severe swelling, pus drainage, fever, or an increase in pain
To help prevent blisters:
Wear shoes that fit properly.
Always wear socks with your shoes.
Use gloves or protective padding when working with tools.
Wear a hat, protective clothing, and sunscreen when out in the sun.
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This content is reviewed regularly and is updated when new and relevant evidence is made available. This information is neither intended nor implied to be a substitute for professional medical advice. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with questions regarding a medical condition.
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