Both Chuan Wu and Cao Wu are effective in dispelling wind and dampness, relieving swelling and pain, and strengthening the body. They are mainly used clinically for arthritis, frozen shoulder and common rheumatic diseases or sciatic nerve pain, and to relieve pain occurring from cancer, all of which have good therapeutic effects. And Chuan Wu also has the effect of dispersing cold and relieving pain, dispelling wind and removing dampness. For bruises, typhoid pain and pain in the small abdomen and cold hands and feet, it is good for activating blood and relieving pain. In addition, it is effective in dispersing cold and relieving pain, and is good for regulating and treating inflammation of joints and rheumatic lesions. For cold and dampness blocking paralysis, all carbuncles and swellings, it has the effect of dispersing nodules, subduing swellings and reducing inflammation. And Cao Wu has obvious effect of dispelling wind and dampness. It also has a toning effect and therapeutic effect on headache, body pain, joint pain, unfavorable joint flexion and extension, as well as anesthesia pain and bruises caused by wind-cold-damp paralysis. Because it can be taken orally or applied externally, it has a significant variety of pain-relieving effects. In addition grass wool also has anti-tumor effects.