Blood blisters are a common minor injury that can cause discomfort. This article provides information on how to care for blood blisters at home and recognize when professional medical attention is needed. These guidelines help promote healing and prevent complications.
Understanding Blood Blisters
A blood blister is a raised pocket of skin containing blood, unlike a typical friction blister with clear fluid. These blisters form when an injury damages tiny blood vessels beneath the skin’s surface without breaking the outer layer. Blood then pools and becomes trapped between skin layers.
Blood blisters commonly arise from pinching, crushing, or sustained friction that tears delicate blood vessels. The blood initially appears red but can darken to purple or black as blood cells break down. The unbroken skin acts as a protective barrier, shielding damaged tissues from contaminants.
Home Care and Protection Strategies
For most blood blisters, allow natural healing. Do not intentionally pop or drain a blood blister. Breaking the skin removes its protective barrier, increasing infection risk and potentially delaying healing or leading to scarring.
Keeping the area clean and protected is important. Gently wash the blister with mild soap and water, then pat dry. Apply an antibacterial ointment, then cover with a clean bandage or gauze. This covering shields the blister from further irritation, friction, and rupture.
If the blood blister causes pain, apply a cold compress for 10 to 15 minutes several times a day. Over-the-counter pain relievers, such as acetaminophen or ibuprofen, may also be used. Blood blisters heal on their own within one to two weeks as new skin grows and trapped blood is reabsorbed or the overlying skin sheds.
When to Seek Medical Attention
While most blood blisters resolve without intervention, certain signs indicate the need for medical evaluation. Increased redness, swelling, warmth, pus (white, yellow, or green), or fever indicate potential infection. Red streaks spreading away from the blister also suggest a spreading infection.
Medical attention is warranted for unusually large or extremely painful blood blisters, as these may require professional drainage to relieve pressure. Blisters in sensitive areas like the eyes, mouth, or genitals should be assessed by a healthcare provider. If a blood blister does not heal within a week or two, recurs, or appears without clear reason, consult a doctor. Individuals with underlying health conditions, such as diabetes or a compromised immune system, should seek prompt medical advice for any blood blister to prevent complications.