<s>[INST] I have small hard lumps on both side of chin (lymph nodes?). They do not hurt. They move around easily. They seem to go up and down in size - some days they are slightly bigger and then a few days later they are a bit smaller. I am 30 year old male. 5 ft 10, 250 lbs. I have noticed the lumps for about 6 weeks now - no idea how long they were there before i noticed them. [/INST] Welcome to Chat Doctor .1. It looks like sailoadenosis (salivary gland dilatation due to some obstruction, stone or stricture).2. Lymph node always there one cause, but the way you are describing they change in size, its more towards.3. Ti confirm you need to get an ultrasound neck done, which will help you find out where it is existing from and hat all structures it is involving. Consistent (solid, cystic, duct, mass)4. So I would suggest you to get an appointment with your GP and get the needful investigations done. Hope it helps you. Wish you a good health. Anything to ask ? Do not hesitate. Thank you. </s>