IgA nephropathy is a very common glomerular disease in the department of nephrology and is often seen in adolescents, affecting both males and females. Generally, IgA nephropathy itself does not affect menstruation. However, if hormones or immunosuppressants are used during the treatment of IgA nephropathy, it may affect the menstrual cycle or the amount of menstrual flow. In other words, some patients with IgA nephropathy may experience delayed menstruation, reduced menstrual flow, or even increased menstrual flow while using these medications. Therefore, for patients with abnormal menstruation, it is important to report to the doctor in a timely manner and to actively undergo relevant examinations to rule out other causes. If there are no other factors, medication treatment can continue while regularly monitoring kidney function and changes in routine urine tests.