Acne is often considered just a teenage problem, but because spots can be a response to the sex hormone testosterone, they may appear at puberty, before a period, while on the pill or pregnant, or during menopause.
Spots occur when oil pores get blocked by dead skin, allowing skin bacteria to colonise the pores, causing inflammation and red spots. You can help prevent this by keeping your hair away from your face and eating good diet.
Treat acne with a pH-balanced soap free cleanser and a spot treatment. These can dry skin out so use an oil-free moisturiser. If acne persist, see your GP, who may prescribe hormone treatments for women or other medication.