What Causes Loose Motion In An Infant?

My baby is 10 months old. and 10 days back he had motions. then that time we consult a doctor. he said because of infection it happens. now again he is having loose motions nearly 10 times at a time and whole the day nearly 15 times. so i am very temptative. but he is not having any fever, wamptings nothing. he is as usual active. can u suggest some solution for my baby. thanks venkat