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Thumb nail and index finger got black. Why ? - Online Doctor Chats

Date : 10-Jun-2013
User rating for this question
Very Good Posted in: General Health
Answered by

General & Family Physician
Practicing since : 2002
Answered : 106 Questions
Doctor:Dr XXXXXXX here
User:Hi Doctor
Doctor:How can I help you?
User:My thumb nail has become slightly black
User:that is of ink color
User:also some time I see my index finger also as black
Doctor:May I know your age?
User:color fades also at time but soimetikme it becomes more promionent
Doctor:Since when have you noticed this?
User:since last two weeks or so
User:it disappers also some timw
User:what may be the reason >
Doctor:Did you sustain any injuries?
Doctor:Do you have pain or any abnormal sensation of the hand?
Doctor:Let me brief you.
Doctor:Nail covers the nail bed which is a very vascular structure.
Doctor:The capillary blood vessels under the nail bed is influenced by temperature changes.
Doctor:Cold weather causes constriction resulting narrowing which leads to accumulation of deoxynated blood.
Doctor:Deoxynated blood impairs dark purple to black color.
Doctor:If the changes that you see are more during cold weather this could be the reason.
Doctor:This phenomena of color change secondary to exposure to cold weather is known as reynauds phenomena.
User:but the weather here at B'lore is not that cold also but my index finger also turns black
User:also I see problem with my right hand only ... left hand looks perfect
Doctor:If the color change you see are during early morning hours and late evening hours when the temperature drops
Doctor:or when you dip your hand into a cold solution/water or when you hold something very cold
Doctor:then this phenomena applies.
User:I generally do not get in contact with cold items
User:yester noon it was very prominent
Doctor:Apart from reynaud's phenomena, other causes of nail color changes are:
Doctor:1. Secondary to injury.
Doctor:2. Narrowing of blood vessels in the arms.
User:I hc not sustained any injury
Doctor:3. Presence of congenital heart disease.
Doctor:Without a clinical examination, I am unable to predict if any of the other possibilities are associated.
User:So I need to see a doctor
Doctor:Therefore I would suggest you to consult a doctor nearby. A doctor can examine the nail, perform some simple tests to assess the blood vessel functions and heart and follow up with relevant tests to confirm the cause.
Doctor:Yes, I would like you to see your doctor nearby.
User:to a physician ?
Doctor:A physician or a vascular surgeon can help.
Doctor:Have you followed?
User:thanks a lot for your advice
Doctor:Do you have any doubts?
User:no . appreciate your help
Doctor:You are welcome.
Doctor:Thanks for consulting me.
Doctor:Bye for now.
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