It is not a disability. Hair Fall due to Cancer Treatment. 10 Major Causes of Hair Fall - Find What Leads scientific reason for not washing hair during periods As a result, distressing energies from the environment are continuously attracted to the hair left open. who does glory marry in wings of fire? Just about anything you can do outside of your period can also safely be done during your period, though wanting to do it is another matter. In response to your whole post, your Grandma isn't totally crazy. Of course your hair has nothing to do with your period, but cold CAN make your cramps worse. Getting a Haircut on Certain Days Answer (1 of 49): I avoided washing my hair during my periods. scientific reason for not washing hair during periods