Hard to say: As this most commonly would be related to vascular issues, possibly arterial or venous or both. But his best bet is first see a doctor to better identify the cause, as it very well may not be related to anything previously mentioned, and to be able to better guide you/him, the actually cause of his symptoms are very important. Best of luck.
Answered 9/2/2014
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2 doctors weighed in across 2 answers
A doctor has provided 1 answer
2 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
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