If the knee is sore and weak during menstruation, it is most often caused by Qi and blood deficiency, and such women will have a yellowish complexion and depressed spirit. For example, pigeons, Radix et Rhizoma Ginseng, Radix Astragali and a little red dates can be stewed twice a week to improve the symptoms of sore and weak knees during menstruation. In addition, you can also take Wuji Baifeng Pills orally, which will also improve the symptoms of sore and weak knees. During menstruation, you can soak your feet in hot water, the purpose of which is to promote local blood circulation in the lower extremities and improve the corresponding clinical symptoms of sore and weak knees.