The normal value of lymphocyte count is usually in the range of 0-10×10^9U/L. If the lymphocyte count does not increase, it may be due to the presence of infections 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 elevated 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.