Conversation: The conversation between human and AI assistant.
[|Human|] I have a hard lump on left back side of my head close to base of skull. It hurts to touch or bend my head forward. Also have a burning sensation with pain starting also on right side. Headache starting to develop. Please inform me to what this might be. Feel like the back of my head is going to blow.
[|AI|]  Hello! Thank you for the query. Most likely you have a sebaceous cyst which has gotten infected. This causes pain, swelling and redness in the lump area. Sebaceous cyst is a benign skin lesion filled with whitish masses. It does not turn into a cancer however may be a source of infection. Please do not wait with it as head infections can spread to the brain. You should consult general surgeon. An incision should be done and pus Chat Doctor. Hope this will help. Regards