These include visible, bubble-shaped pockets on the skin filled with fluid or blood that appears red, dark purple, or black.

Vesicles are small fluid-filled sacs or blisters that can appear on your skin. The fluid inside these sacs may be clear, white, yellow, or mixed with blood. If your vesicles are caused by an ...

Breast blisters are usually ... form under the outer layer of skin in response to an injury. Most blisters are filled with clear fluid but may be filled with blood or pus if they become infected.