For patients with chronic cough and chronic obstructive pulmonary disease. An old patient recommended a recipe to me: 5 pieces of dokko garlic, boiled in three bowls of water to make one bowl of water, which has good effect in dissolving phlegm. Later, when I recommended it to other patients in the clinic, I achieved certain efficacy. It is especially effective with mainly white phlegm. However, it is not suitable if the phlegm is yellow and hot. The medicinal value of garlic head is as follows: 1. Natural enemy of bacteria: Garlic head contains volatile allicin, which is a natural broad-spectrum antibacterial agent. 2. Garlic contains effective ingredients that can activate human macrophages to engulf cancer cells, thus preventing cancer generation. A joint study in Shandong and Beijing, China proved that garlic can block the synthesis of carcinogenic substances nitrosamines in many ways and kill Helicobacter pylori in the stomach, thus having the effect of preventing stomach cancer. 3. Garlic can reduce blood cholesterol content and reduce atherosclerotic plaque, thus preventing atherosclerosis and coronary heart disease. In China, it has been reported that garlic essential oil 0.2ml/day was used to treat 1000 cases of hyperlipidemia, and the total serum cholesterol, triglyceride and beta lipoprotein all decreased significantly after 1 month of continuous use.