A member asked:

My thumb has minor swelling,pain to touch and blue-black above the knuckle shaped like a small patch and goes down a line to the knuckle.how to treat?

A doctor has provided 1 answer
Dr. Corey Clay answered

Specializes in Allergy and Immunology

Needs to be seen: Worrisome conditions that can present this way are infection and vasculitis. Please see your physician.

Answered 3/21/2015

3.1k views

Thank

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