According to the information on the career design website, you can wash your hair on your birthday, which has nothing to do with washing your hair. Washing your hair with clean water and cleaning products is outrageous. Washing your hair every day can not only protect your hair, but also damage the scales of your hair and have a negative impact on your hair. Birthday refers to both the date when a person was born and the anniversary of his birth. Traditionally, people in China calculate their birthdays according to the lunar calendar. Birthdays are also called birthdays. Mothers' birthdays are difficult, old people's birthdays are called birthdays, and birthdays over 50 can be called birthdays. There is not much relationship between them.