Hi. I've noticed a funny bump on my head this past week, it's on the left side of my head, it's about 4 fingers from my ear. It's not big but it is very unusual. I have pain running all the way down from the bump to my shoulder (almost like stiff/spasm pain). Don't know if stress might cause this, I'm studying for upcoming exams. Just wondering if anyone can give me some guidance? Think it's serious or should I wait it out a while?

Thanks