Under normal circumstances four months of the little baby is able to drink pear water properly, can play the effect of lung moistening. But because the baby is relatively small, may not have added other complementary food, the child’s gastrointestinal tract function development has not been perfect. So when adding pear water to the baby, first of all, it can not be too cold, so as not to stimulate the child’s gastrointestinal tract caused by diarrhea and other uncomfortable symptoms. Secondly, pear water should not be too sweet, so as not to affect the child to eat milk. Do not give too much pear water each time, about 10-20mL is appropriate. But if the child needs to drink pear water because of cough, it is recommended to take the child to the doctor first, let the doctor listen to the baby’s lungs, after doing the relevant auxiliary examination to clarify the child’s situation. In addition to drinking pear water, you also need to standardize the medication treatment, in order to let the child recover as soon as possible.