6 doctors weighed in:
What causes blue knukles off and on?
6 doctors weighed in

Dr. Morris Westfried
Dermatology
3 doctors agree
In brief: Circulation
There is an issue with blood supply to the area, which needs to be examined by a physician.
Smoking could contribute, it could be a variant of raynauds phenomenon, it could be associated with rheumatoid arthritis ( although that should persist). Are the hands abnormally cold? See a doctor to determine the underlying problem.

In brief: Circulation
There is an issue with blood supply to the area, which needs to be examined by a physician.
Smoking could contribute, it could be a variant of raynauds phenomenon, it could be associated with rheumatoid arthritis ( although that should persist). Are the hands abnormally cold? See a doctor to determine the underlying problem.
Dr. Morris Westfried
Dr. Morris Westfried
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Dr. Marsha Davis
Internal Medicine
2 doctors agree
In brief: Lots of things
Do they itch, burn or hurt? How old are you?If there is a clamping down of the small vessels in the skin, could be one case but is usually more common on the finger tips.
As a person ages, the skin naturally thins. You might just be seeing normal blood after delivering oxygen to the fingers. Blood without oxygen exposure is blue- which is why it turns red when you see it after a cut.

In brief: Lots of things
Do they itch, burn or hurt? How old are you?If there is a clamping down of the small vessels in the skin, could be one case but is usually more common on the finger tips.
As a person ages, the skin naturally thins. You might just be seeing normal blood after delivering oxygen to the fingers. Blood without oxygen exposure is blue- which is why it turns red when you see it after a cut.
Dr. Marsha Davis
Dr. Marsha Davis
Thank
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