Ginger and garlic together can relieve cough and asthma, relieve cough and phlegm, and relieve colds. Boil ginger, garlic and brown sugar in water: If you cough violently, there will be more white thin phlegm, indicating that you have a serious cold. When eating the dietotherapy prescription, add water boiled with ginger, garlic and brown sugar. Children can use 3 slices of ginger, 3 cloves of garlic and half a spoonful of brown sugar, while adults can use 7-8 slices of ginger, 7-8 cloves of garlic and one spoonful of brown sugar. Put them in the pot and add water. Can be cooked for 10 minutes. Severe cases can be three times a day.