<s>[INST] I have a small moveable lump mid jawline on the left side. It hurts very little when pushes, about 2-3/10. I'm worried about this although it hurts less today than it did yesterday, but I only noticed the lump today. I'm 12 and has my 12 year molars growing in just in case at has something to do with it. [/INST] Hi,Thanks for posting the query,       This lump could be due to infection,the infection in the tooth has spread to the surrounding peripaical tissue leading to formation of lump.I would suggest you to get a checkup done take an x-ray.Drainage of the abscess is required.A course of antibiotics and analgesics is required.At hometake lukewarm saline and antiseptic mouthwash rinses.Take care! </s>