Baby diarrhea can be quickly relieved by taking montelukast, mammazine and lactobacillus granules. Firstly, montelukast can not only improve the protective barrier of intestinal mucosa after taking it, but also adsorb bacteria and viruses in the intestine and promote the formation of stools, which can achieve a good anti-diarrheal effect, and giving montelukast to babies will not affect their physical development. Secondly, Mamma’s Aid can maintain the intestinal micro-ecological balance and relieve the intestinal peristaltic speed too fast, so it has a regulatory effect on indigestion, bloating and constipation. Finally, lactic acid bacteriocin granules can form a protective film in the intestine, which can not only inhibit the invasion of the intestinal mucosa caused by viruses, but also stimulate the intestine to secrete antibodies and improve the function of the intestine. Parents should pay attention to let their babies drink more water to reduce the possibility of dehydration.