Garlic is known to be useful in treating coughs. First of all, garlic is antiseptic and disinfectant. Coughs are often respiratory infections that occur with viruses or bacteria, so garlic has a certain killing effect on both bacteria and viruses, which is good for relieving coughs. In addition, garlic can also stop coughing and dissolve phlegm, which often has a therapeutic effect on coughs with phlegm. If it is accompanied by a sore throat, you can cut garlic into slices and put them in your mouth for 10-20 minutes, which is good for relieving a sore throat and relieving cough and phlegm. If coughing and phlegm are serious, you can also drink garlic and rock sugar water to stop coughing and dissolve phlegm. 30g of garlic and 10g of rock sugar can be added to two large bowls of water, and then a small bowl of water can be boiled and drunk while it is hot. If the cough and phlegm are serious, it can be taken 3 times a day. If the cough is caused by cold, you can also add ginger to the garlic and rock sugar water to make it more effective.