<s>[INST] Hi. Two days ago I discovered a small pea sized lump on the back of the left side of my head by the hairline. It's somewhat hard and I have some neck pain but I've been touching it a lot. I'm trying to get a doctor's appointment this week since I go back to school soon. But should I be overly concerned or what? [/INST] Hi,From history it seems that you might be having enlarged occipital region and nothing to worry.It shows that you might be having some infection on scalp like dandruff, skin infection or dermatitis.Consult your doctor and get examined.Ok and take care. </s>