Dizziness after menstruation may be related to the following factors: First, the bleeding volume during menstruation is relatively large, there is a possibility of anemia. Some women have a high menstrual volume and prolonged duration, which may cause chronic anemia, resulting in lower hemoglobin content in the blood and insufficient oxygen supply to the brain, making it easy for dizziness to occur. It is recommended to go to the hospital for routine blood tests and confirm the diagnosis. Second, women are weaker and have low immunity during menstruation, causing dizziness due to colds after menstruation. Third, if persistent dizziness keeps occurring during and after menstruation, it may be related to hormonal changes in the body during menstruation. The increased secretion of prostaglandins in the body during menstruation easily causes spasmodic contraction of blood vessels in the brain, which reduces the oxygen supply to the brain and makes it easy to have headache and dizziness, and the symptoms will be relieved after the end of menstruation.