20 year old male . my carotid artery seems to be pushed outward near the top accompanied with some occasional discomfort. could this be a tumor ?

Several possibilitie: May just be natural curvature or size for you, but carotid tumors or aneurysms are possible. Pain is concerning but could it be referred from jaw or teeth? A quick non-invasive test would be an ultrasound that is painless and relatively quick and could answer your questions. Would check with vascular or cardiac doctor to arrange such a study.

Unlikely: This can be definitively assessed by performing a duplex ultrasound to evaluate the bulging area. I suggest that you see a vascular surgeon or your primary doctor for evaluation. Good luck, David Fox, MD, FACS www.FoxVein.com