<s>[INST] My wife has had a lump on the back of her head that hurta to touch. It is hard and right at the back of her skull not low near her neck. She recently has had two more develope. She s had frequent migranes apnd has high blood pressure. What could cause these lumps? [/INST] Hi! Good evening. As per your history, these lumps seem to be benign swellings like sebaceous cysts, which might not be related to the migraine and high blood pressure problem of your wife. I would advise you to get it clinically examined by a general surgeon who might suggest her for a FNAC (fine needle aspiration cytology) or an excision biopsy for a cytological diagnosis and possibly a cure. I hope this information would help you in discussing with your family physician/treating doctor in further management of your problem. Please do not hesitate to ask in case of any further doubts. Thanks for choosing Chat Doctor to clear doubts on your health problems. I wish you an early recovery. Chat Doctor. </s>