1) Don't lose weight during menstruation. I have a group of sisters who lose weight. Many people gain 3-5 kg during menstruation, which is normal and has metabolic problems. And if you lose weight during menstruation, it is easy to lose your hair and have irregular menstruation.

2) I can tell you a way. If you are really not thin, you can improve your metabolism or eat an derailed meal, and then the platform period will soon pass.

3) The menstrual period is not a platform period, but after the menstrual period, you can forget it when your physical factors are stable. But the time is short. I have many sisters, 1-2 months.