I get bad throbbing headaches on the side of my head and i've have had a lot of concussion and my heads been bust open a few times what could be wrong?

Post traumatic HA's: You seem to describe possible migraine headaches, but could have a TMJ trigger or even problems from neck or tos. Head trauma certainly does leave residual problems, and likely you will be at risk for future headaches. Suggest using preventative migraine rx or otc meds to decrease both frequency and intensity. See your doctor and devise a strategy.