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