The way to regulate menstruation depends on the reason why menstruation is getting less and less, part of the situation may be related to malnutrition, can be regulated by diet, part of the disease causes, need to be regulated by drugs. 1. Diet regulation: long-term weight loss and excessive dieting can lead to malnutrition, low menstrual flow, you should stop losing weight, strengthen nutrition, you can eat more eggs, lean meat, milk and other food conditioning. 2. Medication: Hormone level disorders, hypothyroidism and other diseases can cause less and less menstruation. It can be treated by exogenous estrogen supplementation, such as estradiol, estradiol valerate, norethindrone, levothyroxine sodium tablets, etc. It is recommended to go to the hospital for a detailed examination and symptomatic treatment for the cause of menstruation, and all the above medications should be used under the guidance of a doctor, avoid self-medication.