There is an animal, pure black, like a snake, called Moshe in Taizhou, Zhejiang.

Reptiles have protease and many bacteria in their mouths, which will definitely swell after being bitten. Sometimes it's not poisoning. Some people are allergic to reptiles. In this case, you should try to eat less anti-allergic drugs. After being bitten, you should immediately clean up the wound, squeeze out the blood and let the wound heal naturally. Don't wrap it in hot weather.