Contact allergy?: This may be from exposure to a contact allergen. Is there a certain activity you often use with your left index finger? Try topical cortisone for a few days, if problem continues or recurs , consult an allergist or dermatologist who may perform skin patch testing to contact allergens on you.
Answered 4/2/2018
352 views
Not certain: Could be a vascular problem or a neurologic problem. Itching suggest allergic reaction. Consider all of these a possiility. You need to discuss this with your physician.
Answered 4/2/2018
352 views
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A doctor has provided 1 answer
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