What are blisters?
The epidermis, dermis, and subcutaneous (below the skin) fat are the three layers of skin. A blister appears as a fluid-filled sac beneath the epidermis. Depending on the injury that harmed your skin, it may be filled with clear liquid or blood.
Blisters can be both painful and itchy. When a blister becomes infected, it fills with milky-white pus. Blisters are most commonly found on the feet or hands, but they can occur elsewhere on the body.
Do I need to have a doctor look at my blister?
Blisters rarely require the attention of a healthcare provider. Blisters have no tests or diagnoses.
If your blisters were caused by a burn or frostbite, a healthcare provider may need to treat the underlying cause. You should also consult your doctor if a blister displays signs of infection, such as:
- Pus (discharge that is yellowish or greenish).
- The region around the blister may be hot or uncomfortable.
- There are red streaks around the blister.