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Blisters (finger): There are almost limitless causes of blisters on the finger. Course contact dermatitis is the most obvious cause especially if you have any rash anywhere else, but there are such strange things is herpes zoster appearing first i'm just a single finger, which we've seen many times.
Blood blisters can be caused due to constant rubbing of the skin which is often caused for baseball pitchers. It can occur when sharp tool tears the skin. Frostbite can also cause blisters on the skin. Symptoms : Blood blisters are seen mostly on the hands or feet when the skin is injured or cracked. It is the collection of serum fluid in the damaged area of the skin. It may or may not cause pain. In case of infection, blood blisters turn red in color with moderate swelling.