This document discusses diseases of the throat including tonsillitis, pharyngitis, and larynx cancer. It provides details on the causes, symptoms, and treatment of tonsillitis. Tonsillitis is commonly caused by streptococcus bacteria and causes throat pain, difficulty swallowing, and fever. Complications can include pneumonia, nephritis, or rheumatic fever. Treatment involves antibiotics, rest, pain medication, and sometimes surgical removal of the tonsils (tonsillectomy) for recurrent cases.