It is recommended not to take Tianma more than three times a week. Fresh tianma is controlled within 100 grams per person per time, and dried tianma within 20 grams. Tianma is a flat, sweet Chinese herbal medicine, with tranquility and sedation, wind and pain relief, strengthen the muscles and bones, etc., can be used for the treatment of vertigo, headache, convulsions, numbness of the limbs, etc.. Tianma is generally taken in water, dry Tianma 10 grams at a time can be soaked. Because there are several components in Tianma belong to allergens, so consumption may lead to chest tightness, nausea, skin pimples, urticaria, allergic purpura and other adverse reactions. In addition, Tianma also has certain toxic side effects, long-term or excessive consumption may lead to acute renal failure, accelerated heart rate as well as respiration, and even coma, so it is not recommended to take every day, always follow the doctor’s instructions for medication. Therefore, when patients take tianmai produce skin itching, rash and other allergic reactions or side effects, should be discontinued in a timely manner, as soon as possible to consult a traditional Chinese medicine department or emergency department.