Symptoms of lactose intolerance in infants include frequent bowel movements, bloating and abdominal pain. 1. Frequent stools: a common symptom of lactose intolerant infants is frequent stools, can be up to 10 times, stools are separated from the water yellow eggdrop soup-like, inside the milk petals, bubbles or foam, there is a sour smell. Due to the stimulation of the stool is prone to perianal redness or diaper dermatitis. 2. Abdominal distension: Infants have obvious abdominal distension, hardness of the stomach, hyperactive bowel sounds, gurgling sounds from the stomach, love of hiccups, spitting up, sour taste in the mouth, and more farts. 3. Abdominal pain: infants love to cry due to abdominal pain, it is not easy to appease, often after defecation improved. It is recommended that parents, if the baby in the consumption of dairy products after the occurrence of the above symptoms, should consult a doctor in a timely manner, according to the doctor’s guidance to adopt a lactose-free diet, according to the symptoms of the symptomatic treatment, so as not to affect the normal growth and development of infants.