If the 10-month-old baby diarrhea, fever, commonly caused by the following reasons: 1, indigestion: if it is due to gastrointestinal indigestion caused by diarrhea, fever, you can take drugs to help digestion for treatment, such as lactase raw with probiotics for treatment. If the number of diarrhea is more, you can take montelukast for treatment; 2, viral infection: caused by viral diarrhea, mainly symptomatic treatment, you can let the child drink more water, drink more oral rehydration salts, to avoid the phenomenon of dehydration of the child, usually about a week can be self-healing. If the symptoms of diarrhea are more serious, and the child is accompanied by the phenomenon of dehydration, you need to go to the hospital.