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

### input:
i have a lump on the back of my neck.  i have had it for around 2 years and its got bigger as time has moved on. i have seen a doctor numerous times over the 2 years and i have been told its probably a cyst and that it would need surgically removed. i am a british person living in america, so its hard for me to get better advice as i cant afford to pay to see a doctor. i am very concerned. the lump is not painful to touch, but it does feel uncomfortable most of the time and this brings on dull headaches. the lump moves if i touch it. its underneath my hair, so it is hidden, but i am worried it will keep getting bigger and bigger. i have had sensitive skin since i was a child and mild acne, so i am wondering if it has something to do with that. occasionally, small blemishes will appear around the lump which are so small, i can scrape away with my finger nails.  this makes me think it is acne related, rather than a cyst.

### output:

Welcome to Chat Doctor .1. History given by you suggest me it's a lipoma (lump with fat content) in the first place, followed by cyst. 2. Since it's hard on touch, pain less, slow growing - more towards lipomatous lesion.3. If its causing discomfort and dull headache - excision is treatment of choice.4. Before that an ultrasound - which helps in assessing the nature of the lesion, its source and extension. Then FNAC - fine needle aspiration cytology to confirm the fat content.5. Folowed by treatment - excision depending on discomfort, otherwise asymptomatic lumps will be just monitored. Good luck. Hope it helps you. Wish you a good health. Anything to ask ? Do not hesitate. Thank you.