Reishi in water can be used to tonify the qi and calm the mind, and to relieve cough and asthma (stop coughing and calm wheezing). The bad effects of drinking ganoderma lucidum in water are not clear. Ganoderma lucidum is the dried fruiting body of the fungus Chi Chi or Zi Zhi of the family Polyporaceae. It is sweet and neutral in nature, and belongs to the heart, liver, lung and kidney meridians. It has the effect of tonifying qi and tranquilizing the mind, relieving cough and calming wheezing. It can be used in the treatment of restlessness, insomnia, palpitation (rapid heartbeat, often accompanied by panic), cough and asthma, fatigue, and lack of appetite. The adverse effects of the drug are not clear, but avoid eating spicy and stimulating food while taking it. Reishi in water has limited efficacy and is not a substitute for medication in the treatment of diseases. If you need medication, it is recommended to go to a regular hospital, under the guidance of a professional doctor to identify and treat.