What could a hard lump be behind both ears near the jawline that have been there forever?

Answer:

It could be the mastoid processes.

Answer

These also can be little cysts (not cancerous) or fatty nodules. If you are worried then please see your doctor.

First answer by Marcy. Last edit by Marcy. Contributor trust: 8944 [recommend contributor recommended]. Question popularity: 36 [recommend question].