Inflammation of the tonsils is called tonsillitis, which can sometimes resemble the flu. Symptoms usually resolve in three to four days, but there are things that can be done to relieve symptoms in the meantime. The National Health Service recommends the following when treating tonsillitis at home: get plenty of rest, enjoy cool drinks to soothe the throat, take pain medicine, and gargle with warm saltwater. National Health Service, September 2019