The dosage of Hedyotis diffusa is 4.5~9g for internal use in decoction, and moderate amount for external use. It belongs to traditional Chinese medicine, belongs to the heart, liver and lung meridians, and is the rhizome of the plant Hedyotis diffusa. This product can clear heat and detoxify the body (removing heat and toxicity from the body), and can also reduce swelling and relieve pain (eliminating swelling and pain). It is often used in the treatment of mastitis, tonsillitis and mumps, epidemic encephalitis B, as well as snake and insect bites; it can also be used for sores, swellings and poisons. The flowers can be decocted and taken internally 4.5~9g, and can also be used externally in appropriate quantities. Seven leaves a branch flower contraindications, precautions are not clear. It is forbidden for those with external ulcers of Yin evidence and pregnant women as well as those with deficiency of vital energy. Before taking this medicine, you need to be guided by a doctor for identification, and you can’t take the medicine on your own to avoid adverse consequences to the body.