A Parent Shares Concern After Finding a Large Unexplained Spot on Their Daughter’s Foot

Blood blisters are a common type of skin injury that can appear suddenly and often look more serious than they actually are. Unlike regular blisters filled with clear fluid, blood blisters contain blood that becomes trapped beneath the skin’s surface.

This gives them a dark red, purple, or even black appearance, which can be alarming at first sight. In most situations, blood blisters are minor and heal naturally without medical treatment.