The first bump you describe might be a lipoma, which is just some fat that for some reason built up under the skin. The way to tell is if you can squish it at all, then it's probably a lipoma. I get them behind my ear (and so does my mom and grandfather, must run in the family). I went to an Ear, Nose, and Throat doctor about it and he said it was a lipoma, nothing to worry about, except if it gets bigger and starts pressing on a nerve or something. Then, he can remove it. He says the fat squishes right out when he makes an incision (yuck!). I wouldn't recommend trying to squish it too hard, I did that with mine, and it squished and spread (it got flatter, but bigger, I guess I just squished the fat down).
The second one sounds like it is a lymph node (last poster called it a gland, same thing). You have lymph nodes under your jaw line. Lymph nodes get swollen from all sorts of infections, it could be a sore tooth, a sore throat, or who knows? If it stays swollen, you might want to go to the doctor just to make sure you don't have any underlying infection. I've got one in my neck that stays swollen to about 5mm for no good reason. The ENT doc said come back to him if it gets to be 2cm or more, and they will biopsy it. Also, if you start getting more of them, be sure to have it checked out, that indicates that you do have some sort of underlying illness.
Something that helped me with all of the bumps on my body (LOL) and trying to figure them out was to go to the library and check out an anatomy book. Then, once and for all, I was able to see where all the lymph nodes were in the body, so I could see if the bump was likely a lymph node or something else.
Susannah
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