Kidney-yang deficiency is generally manifested as deficiency and cold. For example, it is afraid of cold, and it is easy to have backache, leg pain, edema and diarrhea. Kidney-yang deficiency is a manifestation of functional degradation. It is easy to happen to people with cold constitution. Shenqi pill can be used to tonify kidney-yang during treatment. You can eat medlar in your diet and eat less cold food. I hope it helps you.