Wash Hair Once a Week
Black women often hear that they should wash their hair infrequently to prevent it from drying out. If you have naturally dry hair or use chemical relaxers, which can make hair dry and brittle, you should rinse your hair in water every day but only wash it about once a week to once every 10 days.
Wash Hair More Often
Not all black women have dry hair, however. In particular, black women with biracial ancestry may have hair that gets more oily. If washing your hair once every seven to 10 days isn't enough to keep it clean, try washing it twice a week.
Although black women have similar hair, they don't all have the same hair types and hair care needs. Wash and condition your hair based on how greasy or dry your hair feels, not based on how often black women are "supposed" to wash their hair.