<s>[INST] had a itch on head behind left ear think it mastoid bone and it has a bump rubbed n rubbed made a sore it is going away my head itches there n base of head I do have firbomaylgia to. it has me scared had mri done last ear had infection on mastoid bone (but there was no bump) they said it was minor n would clear up I get head pain as well as body pain due to fibro and im worried it has been a week now I get headaches with the fibro to. [/INST] Hi, there!The mastoid infection is serious condition and is treated by intravenous antibiotics (Cefalosporins)Contact Your primary doctor to manage Your treatment.I hope this helps </s>