The baby ate lactase or diarrhea, may be due to indigestion, enteritis, lactase dosage is insufficient and other causes, need to target to take general treatment, drug treatment. 1. indigestion: baby diarrhea may be because of its own digestive capacity is relatively weak, if feeding improperly, such as drinking cold milk, it may lead to indigestion, to appropriate massage of the baby’s abdomen, generally can promote digestion, if necessary, to give the baby to take pro-digestive drugs, such as Lactobacillus acidophilus, Bacillus subtilis bacillus, and so on. 2. enteritis: may be due to the baby appeared intestinal infection caused by, if it is viral enteritis, generally do not need special medication, but pay attention to drink more water, but also can be appropriate use of oral rehydration salts, to prevent dehydration. If it is caused by bacterial infection. Antibacterial drugs can be applied to the baby, such as cefixime, cefdinir and other drugs. 3. Insufficient dosage of lactase: it may be due to the baby’s lactase dosage is relatively small, did not get enough therapeutic effect, to increase the dosage of medication. Babies in this situation, should consult the doctor in time, with the doctor treatment, not self-medication for babies. The above medicines should be used according to the doctor’s prescription.