There are several possibilities and a physician evaluation should be performed. If the swelling has just started, the throat is sore and the person has a fever, then he or she probably has an infection and should see a physician for culture and possible antibiotics. If the swelling is more long-standing, the throat is sore on one side and the person is a smoker and drinker, then cancer is a concern.

Acid reflux, allergic reactions, congenital malformations, and nutritional deficiencies all can cause tongue swelling. Drugs, infections, injuries and tumors can also cause similar symptoms. The best advice is to see your physician for a complete evaluation.