Nine-month-old baby diarrhea and fever may be due to abdominal cold, indigestion or acute enteritis, etc., the cause of different, different treatment methods, usually can be general treatment, medication and so on. 1. Abdominal cold: abdominal cold can trigger the symptoms of diarrhea and fever, you can use hot compresses on the stomach to improve the symptoms, and add clothing at the right time to prevent further exposure to cold. 2. indigestion: if the baby’s stools are egg-shaped and sour odor, poor appetite, usually due to indigestion caused by diarrhea and fever, can follow the doctor’s advice to take bifidobacteria. If the baby’s temperature exceeds 38.5 degrees, oral antipyretics such as ibuprofen should be taken in a timely manner, and if the temperature is below 38.5 degrees, physical cooling can be done first and close observation. 3. Acute enteritis: usually caused by bacterial or viral infections, need to go to the hospital for routine blood tests to identify the cause of the disease and fever, anti-inflammatory treatment, such as the use of acetaminophen, ibuprofen, cephalosporin antibiotics and other drugs. For more frequent diarrhea, resulting in dehydration, should be timely rehydration therapy. Appearance of nine-month-old baby diarrhea fever, should take the child to the timely consultation, identify the cause, and actively cooperate with the doctor’s treatment.