Inflammation of the gum around an impacted wisdom tooth is called pericoronitis. It usually presents with pain, redness and swelling. There will often be a bad taste from the area. Sometimes you may experience a sore throat or tightness when swallowing. The pain may radiate up and down the face and back to the ear. The opposing tooth may begin to bite on the swollen gum causing even more swelling and difficulty eating. Very occasionally you may become a bit ill generally and feverish. ...