Lycopodium is a kind of grass. First, soak it in water for 30 minutes, usually adding 250 ml of water. After soaking for 30 minutes, boil it on high fire first, and then boil it on low fire for 10 minutes, and the effect will come down. Herba Lycopodii is the best medicine for relaxing muscles and activating blood circulation, which should be taken one hour after meals. It can avoid hurting the stomach, give full play to its efficacy, and protect the pig's feet. It is specially used to treat numbness and cramps in the hands and has magical effects. Lycopodium japonicum can relax tendons and activate collaterals and dispel wind and dampness. The dosage of Lycopodium japonicum for relaxing tendons and promoting blood circulation is generally 9 ~15g, and it can be used to 30g for pregnant women in severe cases.