My child 4 years, two days before he vomiting and yesterday his teacher told me that he had diarrhea and now complains of cramps his stomach and abdo?

Gastroenteritis: It sounds like your child has a "stomach virus." young children can get dehydrated, so it is important to keep his fluids up...Chicken broth, clear liquids, pediolyte, etc. If he does not get better, have him see the doctor for a clinical evaluation. Good luck.

Please see a doctor: These types of symptoms are often indicative of something more significant then any parent would want to deal with alone. Please have the child examined as soon as you can.