What causes a bad odor after menstruation ends?

1. Bacterial infection: During menstruation, the shedding and discharge of the uterine lining create a relatively moist environment in the genital area, which can easily promote bacterial growth. Poor hygiene habits may allow bacteria to multiply and cause odor. 2. Sanitary pad or underwear material issues: Using unsuitable or low-quality sanitary pads or underwear may lead to discomfort and odor in the genital area. 3. Hormonal changes: Fluctuations in hormone levels before and after menstruation can affect the vaginal pH balance, potentially leading to odor.