Is it normal for menstruation to come one week early?

Patient's question:

No

Doctor's answer:

A normal menstrual cycle is approximately 30 days long, with menstrual flow of about 20-50 milliliters, and the period can last for 2-7 days. If it is advanced or delayed by one week within this range, it is considered normal. Moreover, each woman has her own regular menstrual cycle, and your current condition is normal.