<s>[INST] Hi! I have a small lump on the back of my head, on the left side right before you get to my hair line. It feels like it s possible it could be an ingrown hair or something cause it feels like I may have a little sore on the lump. It doesn t really hurt to touch it, just a little sore cause I keep messing with it. But I have noticed I have been dizzy and had headaches lately and I wonder of it s causing it... what does it sound like to you? Has me a little worried. [/INST] Hi! Good evening. I am Chat Doctor answering your query. Although it requires a good clinical assessment for reaching at a diagnosis, from your history it seems to be like a sebaceous/Desmond cyst which could be there for years together without any problem till it gives rise to infection. And I do not think this lump to be a problem or any serious condition. In case it starts giving you trouble, you could go to any hospital and show it to surgeon for the management after the required investigations. I hope this information would help you in discussing with your family physician/treating doctor in further management of your problem. Please do not hesitate to ask in case of any further doubts. Thanks for choosing Chat Doctor to clear doubts on your health problems. I wish you an early recovery. Chat Doctor. </s>