That's because there is something called saponin in taro, which is irritating to the skin. A very small amount of saponin will enter the blood, which has the function of hemolysis, and will cause the decomposition of red blood cells, which will lead to the disintegration of blood cells and the loss of coagulation ability. But saponin will not cause food poisoning, because it can be destroyed by gastric juice, and it will be destroyed when it is heated. So the next time the taro is itchy, just put your hand on the stove or the heater and bake it.

By the way, the next time you buy taro, cut it open and rub it on the back of your hand. If the back of your hand itches, don't buy it. This itchy taro is not delicious. ^_^

There is an alkaloid in taro, which will cause slight irritation to the skin, that is, itchy feeling.

After planing, put your hand on the fire and bake it. If you destroy alkaloids, it won't itch.