Oily Skin and Hair
When do their oil glands begin to produce enough oil that oily skin and hair are an issue?
As with underarm odor and hair, oily skin and hair typically begins anytime after the eighth birthday in girls and the ninth in boys, though it is often not seen until much later. The age for this varies even more than other signs of growing up. Even though almost all teens will eventually develop at least a pimple or two, as many as 20 percent of kids will have dry skin and hair throughout puberty. The average age to develop acne is about 12 1/2 in girls and almost 14 in boys.