I have a a bump on my jaw line. its not noticeable cause its under the skin. it doesn't hurt to much, but its growing. have any idea what this could be?

Lymph node?: Under the jaw there are lymph nodes (that process lymphatic fluid and are immune protective). That is a possibility versus others like a skin infection, but that would have other outside symptoms. If it is getting bigger, it warrants evaluation by your doctor.

See an oral surgeon: Jaw cyst can slowly grow causing expansion of the cortical plate of mandible. Painful ones are usually related to dental infection. Osteoma is a painless bony growth on the outer surface of cortical bone.