Hi, I m 31 years old, female, and had migraine since I was a kid. It was normal for me to experience headaches but these past few days it became intense and I ve noticed a hard lump, sometimes swelling especially when I have headaches, at the back of my neck on the left side beside the spine . I used to do neck cracking to release the tension and sometimes massage it to ease the pain. What could it possibly be? Thank you so much for the help...