Abscess at the root of the tongue is a typical symptom of acute lingual tonsillitis. The lymphoid tissue at the root of the patient’s tongue is granular and elevated, congested and swollen, and is connected to the lower end of the tonsils. In severe cases, there are local ulcers and purulent secretions attached to the root of the tongue. The diagnosis is based on symptoms and lymphocyte count. 1.Symptoms Hypertrophy of the tongue, the tongue body is deficient and fat, or there are teeth marks on the side, and the color is light and tender. The hypertrophy of the tongue is caused by the deficiency of the Yang energy of the spleen, or by both cold and dampness. Swelling and pressure pain in the hyoid bone area: swelling and pressure pain in the hyoid bone area can be seen on physical examination, and sometimes a crushed bone friction sound can be palpated. The initial symptoms are upper respiratory tract infection, such as dry throat, foreign body sensation, burning and sore throat. The pain gradually increases and is more obvious on one or both sides of the tongue root, and in severe cases, it may radiate to the ear and cause severe pain. The patient is acutely ill and occasionally has high fever. The examination shows acute congestion of pharyngeal mucosa, more mucus secretion in the pharynx and oral cavity, lymphatic tissue at the root of the tongue is granular, congested, swollen and connected with the lower end of the tonsils, in severe cases there are local ulcers and purulent secretions attached, and abscesses at the root of the tongue may occur. 2, the number of lymphocytes This is a group of non-homogeneous cells with similar morphology and different functions, which are specific immune active cells and play a central role in the immune response. The number changes less in general disease, and often its proportion is relatively higher or lower due to the decrease or increase of other cells in the blood. Changes in the quality of lymphocytes are more valuable than increases or decreases in quantity, and failure to measure subpopulations of lymphocytes leaves the determination of clinical significance somewhat limited.