Feet are main areas to treat in Chinese Medicine. Meridian-wise, feet has many different meridians to pass such as Kidney, Liver, Spleen, etc. People come in with lots of different reasons for feet pain, but one of the kind is Kidney yang deficiency. Generally when the Yang is difficient (a.k.a weakness) , a person tends to have chills and difficult to digest, lack of sleep etc. When Kidney Yang is difficient, the person's feet might be sore, achy sometimes pinchy with chills. Often times, Chinese Medical doctors give the patient with Yang tonic herbs, such as, yin yang hua, lu long, etc, with combination of specific feet points to ease pain in the feet.