Hi Welcome to the HCM True lactose intolerance usually shows up in the grade-school or teen years. While it s possible for symptoms to appear earlier, it s very unlikely that your baby is lactose intolerant. If your baby has had a severe case of diarrhea, his body may temporarily have trouble producing lactase, and he may have symptoms of lactose intolerance for a week or two. Some medications can also cause the body to produce lower levels of lactase, causing temporary lactose intolerance. People with long-term conditions that affect the intestines (like celiac disease or Crohn s disease) sometimes suffer from lactose intolerance as well. So in my opinion you may try the following measures: 1. Keep your child well hydrated during these episodes with oral rehydration therapy such as lemonade, soups, Buttermilk, curd or ORS. 2. Hold lactose containing milk products for at least 1week. 3. You can try Syp. Emeset for vomiting episodes and Syp. Acetaminophen for fever episodes if they occurs. 4. Start your child on zinc supplement. They are useful in early recovery and also prevent further episodes of diarrhoea. Consult your pediatrician if the child doesn t respond and the oral intake is very poor. For further questions, do contact us.