Hi I am a 17 yet old guy. About a year ago I found a small little bump under my skin near my temple. I never really thought anything of it untill recently. Although the size of the first one is the same recently I have found a few more little lumps like the other one but in other places like under my ear, under my chin, on the back of my neck and even one in my mouth. I have not told anyone about them yet because I thought they were harmless but today I have begun to get worried. The bumps dont hurt to touch and cam move under the skin but always go back to where they were, also the bumps seem to be hard but I'm not 100 percent sure. Could it be cancer and what should I do?