A sudden dark blister, a painful bubble, panic setting in instantly. Blood blisters often appear out of nowhere, looking deep red or purple under the skin and making people fear something serious has happened. In reality, they usually form when tiny blood vessels break under the skin from pressure or friction and the blood becomes trapped beneath the surface, but,
Most blood blisters heal naturally within one to two weeks if they’re left alone and protected from further irritation. Experts say popping them can actually increase the risk of infection because the skin covering the blister acts as a natural shield. However, there’s one warning sign doctors say should never be ignored if a blood blister appears, therefore,