Lump on lower lip that comes and goes. thought it was cold sore but it keeps coming back every month or so. lip cancer? what dr would i go to for it?

Inside or Outside?: A mucocele is a benign painless fluid filled lump that may appear as a soft, compressible bump in the mucosal tissue (inside the mouth) of the lower lip. A history of some type of trauma is the usual cause where the duct to the minor salivary glands in the lip become occluded and results in swelling. If the lesion is crusted, hard and bleeds, you should have it evaluated.