时间长度、血量、痛经程度因人而异，有些人三天，有些人一周；有些人流的少，有些人大血崩；有些人没什么反应，有些人疼到救护车运走，痛经随着时间会改变，以前不痛不代表一辈子不痛。
The length of time, blood volume and degree of dysmenorrhea vary from person to person; some people have it for three days and some people a week; some people have small flow and some people have way too much; some people don’t have any reaction, and some people feel so painful that they have to be taken away by the ambulance; dysmenorrhea will change over time, and not having it before doesn’t mean it won’t happen for a lifetime.