The common symptoms of head and neck cancer in general are :an ulcer or sore area in the head or neck that does not heal within a few weeks, difficulty in swallowing, or pain when chewing or swallowing, trouble with breathing or speaking, a numb feeling in the mouth or on the lips, an unexplained loose tooth, a persistent blocked nose, or nose bleeds, a constant sore throat and earache affecting one side, ringing in the ear, or difficulty in hearing, a swelling or lump in the mouth or neck....