How to distinguish between yang deficiency and yin deficiency

The symptoms of yang deficiency and yin deficiency are different. If it is yang deficiency patients, there will be pale complexion, soreness of waist, clear and long urine, fear of cold and cold limbs, pale tongue coating, etc. If it is yin deficiency, there will generally be symptoms such as hot hands and feet, five upset fever, dry stools, thin pulse count and weakness, etc., which must be distinguished before symptomatic treatment.