Hard lump inside neck. Normal sir/ma'am?

I was just checking my neck, i found there a pea sized/less than size of finger, hard lump/pimple type under skin, is that normal? Its only present in right side of my neck, i checked it on the left side, nothing's there. Exact location would be just beside lower bottom right of tonsillar glands. Shown in the image. There is no swelling or tenderness or whatsoever, just felt that under the skin so wanted some advice... Is it normal sir/ma'am? Please guide me. Note: I don't feel any pain. It feels like there is a hard pimple on the SCM, and its unmovable. No lump visible outside the skin(no mark of any swelling or redness at all), just can be felt inside the skin on the SCM when touched. When i turn left, and touch that it feels thing is exactly on the scm. I attached a pic, moving my head towards left and showing the spot on the scm! Please help me.