Tianma outer epidermis yellowish to yellowish brown, cut surface yellowish white to light brown, there is no red Tianma, so there is no good or bad comparison. Tianma is the dried tuber of the orchid plant Tianma. Taste sweet, sex flat. Attributed to the liver meridian. It has the effect of restraining wind and stopping spasm, calming liver yang, dispelling wind and clearing the channels (dispelling wind evil and dredging the meridians). It is used in treating pediatric convulsions, epileptic convulsions, tetanus, headache and dizziness, hand and foot paralysis, numbness of limbs, and rheumatic paralysis. For the treatment of vertigo and headache, it can be combined with Croton and Rhizoma Diazoxide; for the treatment of epileptic convulsions, it can be combined with Tiannanxing and Fenghuang; for the treatment of vertigo and headache caused by wind-phlegm upward disturbance (wind-phlegm and phlegm evil qi infesting the head), it can be combined with Semen Xie, Atractylodes Macrocephalae and Poria; and for the treatment of rheumatism-paralysis pain, and joint flexion and elasticity disadvantage (the function of joints to be extended and flexed abnormally), it can be combined with Macrophyllum, Gentian Macrophyllum and Mulberry Branches. It is recommended that the combination be used under the guidance of a doctor.