What could a lump be under the jaw bone?

Answer:

I suggest you visit either a doctor or the local free clinic if you have no insurance coverage. There will be an entry in the phone book for your town or a nearby town. It may be a harmless cyst (assuming the lump isn't the result of something obvious like a hammer to the jaw). A cyst is small and round, not much bigger than a large pea, and it will float around a little. But you must get medical help.

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First answer by An8thg. Last edit by An8thg. Contributor trust: 2271 [recommend contributor recommended]. Question popularity: 24 [recommend question].