<s>[INST] I have a small lump on the left side of my neck where the neck meets the back of the skull that is not painful, hard and doesnt move and another on my right thats smaller. Ive noticed it before but only now Im worried that it could be serious, Im only a male teen so Im scared to death it could be some type of cancer. I cant go to any doctor right now because Im currently on vacation.Thank you in advance [/INST] Welcome to Chat Doctor .1. The history you have given suggest most possible cause could be lymph nodal enlargement (painless lumps, long-standing) followed by lipomas (fat content), vascular cause, glandular lesion.2. At this moment if you want to evaluate the cause you need to get an ultrasound examination of the neck done.3. The ultrasound will help in assessing the sours of the lump and its nature (solid, cystic and mixed) and where all it is extending. 4. If necessary a needle sample will be taken (FNAC - fine needle aspiration cytology). That will confirm the diagnosis.5. Not to worry regarding cancer and all - too young to think of that. But it's on your body and bothering you so find out what it is, is you able to do. Good luck. Hope it helps you. Wish you a good health. Anything to ask ? Do not hesitate. Thank you. </s>