The belief that you should not wash your hair on the first day of your period is largely a myth. There is no scientific evidence to support the idea that washing your hair during menstruation has any adverse effects on your health or hair condition. This myth likely stems from traditional or cultural beliefs rather than medical facts. Hair health is primarily influenced by genetics, diet, hair care practices, and environmental factors, not the menstrual cycle.

During menstruation, some people may experience changes in hormone levels, which can affect the oiliness of the scalp and hair. However, these changes do not necessitate avoiding hair washing. In fact, washing your hair can help maintain scalp hygiene, reduce oiliness, and improve your overall sense of cleanliness and comfort. The connection between hair washing and menstrual health is not substantiated by scientific research, and maintaining your regular hair care routine during your period is perfectly fine.