The normal value of lymphocyte count is generally 20-40% of the total white blood cell count, with an absolute value of (0.8-4) x 10^9 If the lymphocyte count is not increased it may be due to the presence of infection in the body, commonly viral infections and bacterial infections, which can cause an increase in the number of lymphocytes. Therefore, it is recommended that patients must seek medical examination in a timely manner. For example, if a local infection exists, it is recommended that patients must apply anti-infective drugs to control it in a timely manner, and the increased lymphocyte count will subside on its own after the local infection is controlled. If the lymphocyte count decreases, the patient may be suffering from an autoimmune disease, and it is recommended that the patient go to the hospital for a detailed examination in a timely manner, and after a clear diagnosis, active symptomatic treatment should be given to avoid unnecessary complications.