Pronunciation: [blˈʌd blˈɪstə] (IPA) 
The correct spelling of the term "blood blister" is /blʌd ˈblɪstər/. In phonetic terms, the first syllable "bluhd" represents the sound of the letter "u" in "up". The second syllable "blis-ter" is pronounced using the short "i" sound in "in" and the "er" sound in "her". A blood blister is a type of blister that forms when blood vessels beneath the skin rupture, causing blood to collect between the layers of skin.
A blood blister is a small fluid-filled pocket that forms between the top layers of the skin, typically as a result of injury or trauma to the area. This type of blister appears reddish or dark purple in color due to the presence of blood within the fluid-filled sac. It develops when small blood vessels near the surface of the skin are damaged, leading to blood seeping into the surrounding tissues.
Blood blisters commonly occur on the hands, feet, fingers, or toes due to friction, excessive rubbing, or pinching of the skin. They can also arise from burns, insect bites, or allergic reactions. The discolored bubble-like appearance of a blood blister distinguishes it from a regular blister, which is typically clear or yellowish. In most cases, blood blisters are not painful and gradually heal on their own within a few days or weeks.
While blood blisters are generally harmless and require no medical intervention, proper care should be taken to prevent infection. It is advisable not to puncture or pop a blood blister, as this can increase the risk of infection and delay the healing process. To alleviate discomfort or pain, covering the blister with a clean and sterile bandage can provide relief and protect it from further friction. If the blood blister becomes infected, showing signs such as increased redness, warmth, pain, or pus, seeking medical attention is recommended.
One which contains blood.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
The word "blood blister" is derived from Middle English, combining the words "blister" and "blood".
The word "blister" can be traced back to the Old French word "blister" or "blestre", which referred to a raised spot on the skin filled with fluid. This Old French word was further influenced by the Latin word "blister", meaning "a bubble".
The term "blood blister" specifically refers to a blister that is filled with blood instead of clear fluid. The word "blood" originates from Old English "blōd", which is derived from the Proto-Germanic word "*blōþam".
