A 3-month-old baby’s cough can be cured at home with dietary therapy, plus the baby’s own immunity, if the symptoms are not severe. First of all, you should feed more water, and secondly, you should distinguish your child’s cough, whether it is a wind-cold cough or a wind-heat cough. If it is a wind-cold cough, then the child’s tongue is white. If it is a wind-heat cough, the child’s tongue is yellow-red. To treat a wind-cold cough, you can use garlic water. Put 2-3 cloves of garlic in a bowl, put a grain of rock sugar in it and boil it for 20 minutes after boiling. Garlic is warm in nature and enters the spleen, stomach and lung meridians, and is very effective in treating wind-cold cough and kidney cough. If the cough is wind-heat, use Sichuan scallop snow pear iced sugar water to treat it. After crushing Chuanbei, put it into the pear with the core removed, put a grain of rock sugar, steam it on the pot for 30 minutes, eat the pear and drink the soup.