Regular water needle manufacturers will only cooperate with hospitals and will not sell them to individuals or so-called agents. You bought something from a treasure or WeChat merchant that is hard to say. Take ten thousand steps back. Even if you get a regular water needle, it will only be useful if you inject it into the skin, and it will be ineffective if you smear it. I used to buy those strange brands, which didn't work at all. Later, I went to Rifchin regularly to do water needles. This is the guarantee, remember to find a regular hospital.