Blood blisters strike without warning, leaving a dark, swollen bubble that can easily spark panic. This ominous, tender mark is simply your body’s rapid response to sudden friction or pressure.
When small blood vessels under the skin rupture from trauma, blood leaks out but gets trapped beneath an intact top layer. This creates a purplish blister on areas like fingers, toes, or even inside the mouth.
Though unsettling, it is typically a minor injury that heals on its own within one to two weeks. The safest approach is to leave it completely intact, protect it, and ease discomfort with a cold compress.
If it breaks, simply wash it gently and apply a bandage to prevent infection. Seek medical advice if you experience severe pain, delayed healing, signs of infection, or have underlying conditions like diabetes.
