### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
I have a red bump on the back of my head that is about the size of a big pea. It is somewhat hard and kind-of sensitive to the touch. Ive had it about 2 months. At first I thought it was a pimple and i popped it, but it just would not go away, now its a red pea sized lump. Have any idea what this may be and how I can get rid of it?

### output:

Hi, Dear Thanks for the query to Chat Doctor virtual Clinic. I studied your query with available details given in your query. I understood your health concerns. Cause of the red bump on back of your head-Though not much information is there in the query, On the existing information it seems that you have-Chronic Subacute Boil/Hair follicle caused post combing trauma Or it could be Sebaceous Cyst witChatDoctorbing bruise and soreness/Or could be Epidermis Cyst. Chronicity with soreness confirms it to be infective but needs to be ruled out from other causes of the scalp lump. Remedy-Consult Surgeon for Second opinion, who would treat it by investigation and clinical examination from many causes of such a scalp lump. Anti-inflammatory / Antibiotics would reduce in few days time. If not, Surgical Excision Biopsy with HPR would treat it totally.Don't Self treat or medicate in your case as the case may go in to further complications. Hope this reply would resolve your query and would help you to plan treatment with your doctor. Hope this would relieve of your health concerns. Welcome for any further query in this regard before final suggestions are given in your query. Wishing you fast recovery. Have a good day. Chat Doctor. N. Senior Surgical Specialist.