Because not everyone has this symptom when they are exposed to yam, it may also be an allergic reaction. At present, it is believed that the factors leading to this kind of contact dermatitis are saponin contained in yam skin or phytoalkaloid contained in mucus, and skin will itch when it comes into contact with these two components.

In fact, after washing the yam skin, it is best to wear a glove, or put a fresh-keeping bag on your hand before peeling it. Or prepare a pot of boiling water, wash the yam, and throw it directly into the water for boiling. In this way, the yam skin is basically cooked, the original allergen is destroyed, and it will not be allergic if it is contacted again. Moreover, after the yam is taken out of the pot, it can be easily removed by gently cutting a knife from top to bottom with a kitchen knife. But be careful not to cook for too long, and it is best to cook the whole root without cutting it.

If you haven't taken measures before, you'll have itchy fingers. You can try the following methods: First, wash your hands first, then put vinegar on your hands, and don't even fall under your nails. After a while, this itching will gradually disappear, which is due to the neutralization of acid and alkali. Second, you can also bake it on the fire, flip the palm repeatedly, and let the hand be heated, which can decompose the saponin that penetrates into the hand. But be careful not to burn your skin. Third, putting your hand in rice and rubbing it repeatedly can also relieve itching.

In addition, people who have experienced itchy symptoms due to contact with yam should avoid direct skin contact with yam; If the skin is dry and chapped or damaged, it is more prone to tingling reaction, and contact should be avoided.