Married, 28 years old, two children, using an IUD for over two years, what is the reason for the small amount of menstrual flow?

Patient's question:

Menstrual volume is low, bleeding occurs a few days before menstruation during sexual intercourse for two or three months. Maternal and Child Health Hospital

Doctor's answer:

Perform pathogen culture + drug sensitivity testing to select sensitive drugs for treatment. Drug treatment includes local and systemic medications. However, for moderate to severe cervical erosion, physical therapy is generally more effective, such as: microwave therapy, LEEP, etc.
During treatment, it is important to rest, maintain hygiene, avoid sexual activity, and refrain from taking baths.