Dandruff is a common scalp condition that causes flakes of skin to fall from the scalp. It is caused by a fungus that lives on the scalp and feeds on the oils produced by the sebaceous glands. Dandruff can be itchy and embarrassing, but it is not contagious and it does not cause hair loss.
Dandruff can affect people of all ages and backgrounds, including bald people. In fact, some studies have shown that bald people may be more likely to develop dandruff than people with hair. This is because the scalp of a bald person is more exposed to the elements, which can dry out the scalp and make it more susceptible to dandruff.