An abscess can be hot or warm if it is infective due to bacteria and it can be cold without heat if it is a tubercular
abscess. In your case since the lump is not painful an
abscess other than tubercular is ruled out and so also folliculitis is more or less ruled out. You may be well, yet a lymph node can swell in response to a local infection, dermatitis or due to dandruff in hair. It can also be an acne. Rarely is it a bony tumor like osteoma.