Acne is a skin disease caused by changes in the pilo sebaceous units(the unit consists of the hair shaft, the hair follicle, the sebaceous gland which makes sebum, and the erector pili muscle which causes hair to stand up when it contracts) of a person. It usually strikes during adolescence but rarely continues till adulthood.
Commonly referred to as pimples, blemishes, spots and zits, acne lesions generally occur on the face, neck, chest, back, shoulders and upper arms. It may range from being mild and moderate to a severe form. While an increase in sex hormones, during puberty, is the leading cause for acne, there are other factors as well that add to its occurrence.
The contraceptive pill can improve acne for some, but worsen for others, depending on the balance of estrogen and progesterone in the brand of the pill.
Now that those acne and pimples are on your face, treating them is your only option. Follow above said dietary management.
However, you need not panic. They do seem scary, but there are a variety of effective treatments that help keep acne and pimples under control.