Hello, are you sure you are yin deficiency? If so, you can only soak Lycium barbarum, and you can't use the other three flavors. You will be angry and uncomfortable after using it. Of course, you must first make sure that you are yin deficiency, such as red tongue, excessive energy, yellow urine, dry tongue coating and even a little yellow.

Generally speaking, you can eat yam, dried tangerine peel, coix seed and other foods to clear damp heat, regulate qi, replenish qi and nourish yin. You can also use Xiaoyao Pill and Baizhi Dihuang Pill for conditioning.