I have been having really bad pain behind my left ear for about five days and it wake me up out of a sound sleep. It worked me because I have had cancer twice and five biopys on my thyroid last year. Could this be something I should see a doctor about?
Hi, Welcome to Chat Doctor, I have gone through your question and understand your concerns.  As per your details, it could be mastitis secondary to ear infection or scalp infection. In my opinion, it appears to be an infection, not cancer. You may require oral antibiotics. Kindly evaluate with an ENT surgeon. Hope, I have answered your query. Wishing you good health.