Garlic and rock sugar boiled in water can relieve the symptoms of cough. Because rock sugar can be used for lung dry cough, garlic can be used for consumption, tonic cough and so on. But garlic and rock sugar boiling water can only relieve the symptoms, if you need to treat cough, it is recommended to consult a doctor, under the guidance of the doctor for scientific treatment. Garlic is pungent in taste, warm in nature, is a kind of traditional Chinese medicine, has the effect of detoxification and swelling, killing insects, stopping dysentery, used for carbuncle sores and ulcers, scabies, consumption, tonic cough, diarrhea, dysentery and so on. Precautions, yin deficiency and fire (Yin essence deficiency in the body, the emergence of hyperactive fire), as well as eye disease, mouth and mouth and the time after the disease are contraindicated. Rock sugar is a kind of traditional Chinese medicine, its taste is sweet, nature is flat, the effect is to strengthen the spleen and stomach (to restore the function of the spleen and stomach), moisten the lungs to stop coughing, can be used to treat the spleen and stomach qi deficiency, lung dryness and cough, or sputum with blood.