Symptoms of an abscess in your tooth or gum may include: an intense, throbbing pain in the affected tooth or gum that may come on suddenly and gets gradually worse pain that spreads to your ear, jaw and neck on the same side as the affected tooth or gum pain that's worse when lying down, which may disturb your sleep redness and swelling in your face a tender, discoloured and/or loose tooth shiny, red and swollen gums sensitivity to hot or cold food and drink bad breath and/or an unpleasant taste in your mouth If the infection spreads, you may also develop a high temperature (fever) and feel generally unwell. In severe cases, you may find it hard to fully open your mouth and have difficulty swallowing or breathing.