Three-month-old babies can eat a little rock sugar Sydney, but the amount must be moderate. This is because the baby's gastrointestinal function is not yet mature, and eating too much will be counterproductive. Rock sugar Sydney has the effects of clearing away heat and toxic materials, moistening the lungs and relieving cough, and can also resolve phlegm, which is very effective for the cough caused by the baby getting angry. Rock sugar Sydney is a common dessert, which has a very good health care function. Eating some can moisten the lungs and help the baby cough.