Is Wanshu elf dysmenorrhea therapeutic instrument good? I heard that Koreans are using it. Useful friends?

I've been using wanshu elf for almost a month. It turned out that menstruation came, and he was too painful to sleep. This time, he didn't feel any pain during his period.

When I sleep at night,

Holidays will not flow, and sanitary napkins will not be dirty.

Going to the toilet in the morning, like urinating, flows a lot.

Come out, it will be over in two days.

!