A member asked:

My boyfriends veins have two hard marble size bulges in them could it be a blood clot?

4 doctors weighed in across 2 answers

Supeficial: What are the location of veins? Is it painful? Any reddness or cord-like feeling over the vein? Might need to rule out phlebitis.

Answered 4/24/2015

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Phlebitis: Direct vein trauma can cause veins to swell and clot, leading to "knots". Usually the veins scar down and close, but can also become infected and tender.

Answered 7/30/2012

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