Vaginal bleeding between periods, also known as intermenstrual bleeding, can have a variety of causes, and it's important to seek medical attention if this occurs. Some possible causes of intermenstrual bleeding include:
Hormonal imbalances: Fluctuations in estrogen and progesterone levels can cause changes in the menstrual cycle and result in vaginal bleeding.
Infections: Certain sexually transmitted infections (STIs) or other vaginal infections can cause bleeding.
Polyps or fibroids: Noncancerous growths in the uterus or cervix can cause bleeding between periods.
Birth control: Some types of birth control, such as hormonal contraceptives or intrauterine devices (IUDs), can cause irregular bleeding.
Cancer: Although rare, vaginal bleeding between periods can be a symptom of certain types of cancer, such as cervical or uterine cancer.
It's important for your girlfriend to see a healthcare provider for evaluation and diagnosis. A healthcare professional will be able to perform a physical exam, ask about her medical history, and order any necessary tests to determine the cause of her symptoms. Treatment options will depend on the underlying cause of the bleeding
