We can't think that Chinese yam can treat spleen deficiency just because it strengthens the spleen. Yam itself is sticky and sticky. It only nourishes the spleen and yin. When the body is wet, the spleen is trapped by moisture. When gastrointestinal dyspepsia occurs, the tongue coating is thick and greasy, so yam can't be used, because the spleen itself can't be transported and dissolved. It takes more efforts to transport and dissolve this viscous substance, and the moisture of yam will further intercept the qi of the spleen and stomach.
In addition, some yams are still in powder form. If you steam it, it is powdered. All the thick roots are powdery. Everything in powder form will stagnate. For example, eating too many sweet potatoes and potatoes will make you uncomfortable, mainly because of qi stagnation, and so will yam. It is said that yam can strengthen the spleen, because it really contributes to spleen yin deficiency. However, if you insist that it can strengthen the spleen, you may use it improperly.
If your tongue is fat, with teeth marks and a thick grease coating, don't use yam at this time. People with diabetes are particularly vulnerable to starvation. If yam and astragalus are used together, they will not starve to death so easily. Diabetes is particularly easy to starve, because spleen yin deficiency, spleen yin deficiency will have stomach heat, evil heat can not kill food, so food is drained before it is well absorbed and digested, so it will starve. At this time, yam tonifies the spleen and nourishes yin, and astragalus tonifies the spleen, and the spleen will get excited. If the stool is thin, a small amount of Rhizoma Atractylodis can be added to moisten the spleen to slightly reduce the viscosity of yam. This is an adjuvant.