DENVER – Sometimes as Freud once said a good cigar is just a smoke. A headache, on the other hand, occasionally can be a sign of something much more serious than just a headache.This is particularly true if it is accompanied by facial pain, neck and shoulder pain, tinnitus or ringing in the ears and unexplained loose teeth. These symptoms, along with jaw pain, limited jaw movement or locking jaw, numbness in the fingers and arms, worn or cracked teeth and clicking or popping in the jaw joints .