Dizziness before menstruation may be a normal situation, but also may be an abnormal reaction, the main reasons are the following: First, consider the emergence of PMS, due to hormonal changes in the body will lead to dizziness, headache, stomach pain and other symptoms, there may also be depression, irritability, insomnia and other symptoms, are normal performance do not worry; second, consider the PMS The dizziness is caused by mental tension, endocrine disorders or overwork, so you should pay attention to rest and not stay up late, especially before menstruation. Treatment.