Six-month-old babies with high white blood cells but no symptoms may be caused by physiological factors or infectious factors, it is recommended to take the baby to the hospital in time for relevant examinations and treatment under the guidance of a professional doctor. 1. Physiological factors: if the baby is stimulated by hot and cold air or emotional amplitude is too large, it may also cause a slight increase in white blood cells, if there are no symptoms, it is a normal physiological phenomenon, generally do not need special treatment. 2. Infectious factors: 6 months baby body immunity is relatively low, more susceptible to bacterial or influenza virus infection, in the early blood test will appear high white blood cells, generally do not have obvious symptoms, parents can take some amoxicillin or oseltamivir phosphate and other medications under the guidance of the doctor for treatment and observation. Pay attention to observe the baby’s symptoms, white blood cells are high, it is best to take the baby to the hospital in a timely manner to carry out relevant examinations, the above need to be used under the guidance of a physician.