Chuanxiong Ligustic Clear Brain Granule is a proprietary Chinese medicine, the main function of which is to dispel wind and overcome dampness, invigorate blood and relieve pain. It is generally used clinically for migraine headaches caused by wind-dampness obscuration and blood stasis, and is indicated for patients who suffer from head heaviness, circumscribed heaviness, headache, and in severe cases, nausea and poor digestive function after the patient has been exposed to cold, or after being poured with rain. Also, it can be used for headache with fixed head pain, mainly pinprick-like pain, which can be slightly relieved by blood stasis after massage, the main effect is to dispel wind and dampness, invigorate blood and remove blood stasis, so it treats migraine.