I never really have headaches ever but just today i got one and i was like okay i have a headache, but i never really felt what a head ache was because i rarely never get them. I dont know if its normal or not but its like in the left side of the back of my head, and theres this little bump thats always been there but i have no idea what it actually is. Im jsut wondering what that bump is and if a head ache is normal in the bakc of the head. Thanks