Lumbricus is cold and salty, and enters liver, stomach, lung and bladder meridian. Its functions are clearing away heat, calming the liver, calming wind and relieving spasm, relieving asthma and diuresis, dredging collaterals and removing arthralgia. Its main functions are as follows: 1, clearing away heat and calming the wind, which is used for febrile convulsion, mania, etc. For lumbricus suffering from salty cold and sexual vagrancy, it can not only calm the wind and stop spasm, but also be good at detoxifying and clearing heat, which is suitable for mania, convulsion and epilepsy caused by high fever; 2, dredge meridians, earthworm is generally used to treat hemiplegia caused by arthralgia or cerebrovascular disease. Lumbricus is good at dredging channels and collaterals, and is used for symptoms such as blockage of channels and collaterals, poor blood vessels and unfavorable limbs caused by various reasons. Because of its cold nature, it can clear heat, so it is suitable for treating joint pain caused by redness, swelling, heat pain and unfavorable flexion and extension, and can also treat arthralgia due to wind-cold-dampness, numbness of limbs and so on. However, it needs to be combined with traditional Chinese medicines such as Radix Aconiti, Rhizoma Arisaematis and Olibanum, such as the commonly used Xiaohuoluo Dan, which has a good effect on treating stroke hemiplegia. 3, clearing away lung heat and relieving asthma, used for pathogenic heat blocking lung, lung failure, leading to various asthma, emphysema, obstructive pulmonary disease, can be used alone or taken orally at the end of grinding, and the decoction is often taken with ephedra, gypsum and almond; 4, clearing heat and promoting diuresis, used for thermal bladder obstruction, dysuria or dysuria. Pheretima enters the kidney with salty cold, which can clear away heat and promote diuresis. It is very effective in treating dysuria. It can be mashed with fresh products, or decocted with Semen Plantaginis, Caulis Akebiae and Alismatis Rhizoma.