<s>[INST] I have a small pea size lump in the back of the head , In the hair line I had it for a few years but it always stayed the same size. But recently it fills a little swollen and also i felt a little pain in the bony side of the back of the ear and it fills like another pea size lump is growing it hurts a little when I touch it so I wanted to know if it s a tumor or something cancerous [/INST] Hi, Dear,Good evening. Thanks for the query to my Chat Doctor Clinic. I studied your query in depth. I am concerned about the worries you have. In my opinion, you have mostly-a infected chronic sebaceous cyst with lymph-adenitis-lump behind your ear. For sure its not-a CANCER or a tumor. But still if it worries you-I would advise you to consult a Surgeon who would do-EXCISION BIOPSY-after Antibiotics, Tb NSAIDs, Treatment for 5 days time. So don't worry and follow my advice for the treatment of your head lump. This would fix your lump worry. Hope with this you would be relieved of your worrisome query. Wellcome again to Chat Doctor. Have a good Day. </s>