Heart fire is known as heart fire in traditional Chinese medicine. It can be treated with Chinese medicines such as lotus heart and yellow dock, etc. The medication should be taken under the guidance of a doctor. Causes of heart fire include emotional depression and fire, internal invasion of fire and heat, excessive consumption of spicy and stimulating warm tonic products, fever, thirst, heartburn, insomnia, constipation, and yellow urine. Lotus heart is cold in nature, bitter in taste, and belongs to the kidney and heart meridians. It has the effects of clearing the heart and tranquilizing the mind (stabilizing the mind by removing internal disturbing heat), transporting the heart and kidneys (the fire of the heart descends and the water of the kidneys rises to restrain each other), and astringing the essence to stop bleeding. It can be used to treat heat entering the pericardium (heat evils invading the pericardium), failure of the heart and kidneys to communicate with the heart and kidneys (heart fire, kidney yin deficiency, and dysfunction of the physiological functions of the heart and the kidneys), insomnia with spermatorrhea, and hematemesis and vomiting of blood with blood heat. Huang Lian is cold in nature and bitter in flavor. It belongs to the heart, spleen, stomach, liver, gallbladder and large intestine meridians. It has the efficacy of clearing heat and drying dampness (removing heat and drying dampness), diarrhea and detoxification (removing fire, poison and evil qi from the body). It is mainly used in the treatment of diarrhea, high fever and dizziness, excessive fire in the heart, red eyes and toothache. Note that this product is very bitter and cold, so it should be used with caution for those who are cold and weak in the spleen and stomach (spleen and stomach weak and cold), and those who are deficient in yin and injured in fluid. When discomfort occurs, consult a doctor and choose medication under the doctor’s guidance, do not use medication on your own.