Left ear vein QUESTION?

behind my ear i believe is a vein,im not sure but it is raised more than normal and it looks thick.ive been sick and coughing a lot and i started working out with heavier weights so i dont know if i could have strained it. it doesnt hurt to touch it unless you press really hard.
or the only other thing is i got a haircut recently and sometimes if the razors arent clean at the place this happens but its lasted a few days so far(ingrown hair?).usually its just a couple hours
what could it be
laundry detergent reaction?
 
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