I am having headaches that even my painkillers won't touch. Is this normal for cervical fusion surgery four weeks post op...anybody know? "Google" isn't helping me much. I had one last weekend; thought it was a one time thing but it came back on Thursday and hung around until last night. I woke up this morning headache free. I am wondering if anybody else has had this problem four weeks after fusion surgery. Not liking this at all!! I had a C5-C6 fusion.