If i had metastatic mandible cancer would there be a lump in my mouth? the lump is moveable and swelling went down with antibiotics. yes i worry alot.

See your dentist: It was not indicated what type of doctor you've seen, if you were diagnosed in the past. Cysts, growth, lumps,..when detected are usually sent for biopsy when removal e.g. by an oral surgeon is required to name the type of lesion.

See your dentist: See your dentist immediately. The dentist may refer you to an oral surgeon if a biopsy is necessary. You state that the swelling goes down with an antibiotic, therefore a radiograph may ascertain if this is associated with a tooth, either endodontic or periodontic.

Not likeley: Lumps of less than three weeks duration are most likely due to a mild oral infection and do not require further investigation, but keep under close weekly observation. If concerned, see your dentist or PCP for evaluation.