Looking for something to heal that dreaded Blood blister? Blood Blisters are friction blisters that contain a mix of blood and clear fluid. They’re usually red when they first form and usually present on the back of the heel from newly worn shoes. In sports they can also present on the sole of the big toe as well as other areas of the feet. Compeed have designed a range of Blister Plasters to treat heal and cushion these blisters and get you back to a full recovery.