Saponins contained in yam skin or plant alkaloids contained in mucus can cause allergic and itchy yam when touched by a few people. Therefore, direct contact should be avoided when handling yam. Don't touch your hands after cutting yam, wash them several times at once, or you will tickle.

Extended data

Common sense:

(1) Gleditsia sinensis Roxb is afraid of heat. You can wash your hands with soap and bake them on the fire a little, which will relieve itching.

(2) If you don't want to eat crisp yam, but stew or burn yam, you can steam and peel the yam with the skin, so that the saponin component will not cause itching.

(3) After the yam is peeled, the mucus on the surface makes it slippery, and it is difficult to hold it firmly or stably on the board and cut it into the desired shape. At this time, you can put some salt and vinegar on your hands, so that your hands will not slip and the normal taste of yam will not be affected.

(4) Soak yam in salt water immediately after slicing to prevent oxidation and blackening.

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