Eating yam aggravates eczema, mainly due to eating the skin and hair on the surface of the yam, if the skin and hair on the surface of the yam is stripped away, just eat the flesh of the yam, can completely achieve the effect of treating eczema. Because the famous Chinese medicine dermatologist, Mr. Zhao Bingnan, once put forward the theory that good treatment of wet, half of the skin disease also. As the name implies, eczema is mostly caused by dampness, and the retention of dampness is mainly due to the weakness of the spleen and stomach. The yam is very effective in treating the weakness of the spleen and stomach, and can be used to strengthen the spleen, benefit the qi and dispel dampness. The treatment can also be combined with lentils or gorgonians to enhance the effect of strengthening the spleen and promoting dampness.