I have a lump on the lower left side of my neck. It does not hurt to touch and has been there for a very long time. I am just no starting to be concerned though. And by the way I'm 13

Do your parents know, if not bring it to their attention.

A trip to the doctors will clear up what exactly it is.

Its impossible for anyone online to say what the lump is, it could be anything from a cyst to a gland to an ingrown hair, no harm in getting the doctor to check it out.

Tell your parents.