Acne develops when hair follicles in your skin become blocked with the natural oil (called sebum) produced by your skin along with dead skin cells.Each follicle is connected to a sebaceous gland just beneath the skin.

The sebaceous glands produce sebum that is designed to keep your skin soft and supple. In normal circumstances, sebum travels up the follicle and out through your pores on the surface of your skin.

If your body produces too much sebum, and dead skin cells get trapped in your pores, a spot will form.

Bacteria that lives on the surface of your skin, causes inflammation in the hair follicles; if the inflammation develops near the surface of the skin, red or yellow spots can develop.  The closer the infection is to the hair root the more severe the symptoms but this is rare.

Acne is not infectious; you can’t catch or pass it on.Contrary to common myths or beliefs, acne isn’t caused by poor diet or hygiene. During puberty both male and females produce more testosterone.

This increases the production of sebum, causing greasy skin which leads to the formation of spots. Sometimes changes during the menstrual cycle and pregnancy may trigger acne.Greasy skin and spots on your face, back and chest are all symptoms of mild and moderate acne.
In most people acne usually clears up after their teenage years but depending on how severe your symptoms are complications may occur.

These include:

• 1 in 5 people suffer noticeable scarring. If you squeeze your spots, scarring will appear, initially they appear purple in colour before fading to white.
• Hyper pigmentation or uneven skin tone, your skin may appear or darker in the affected areas.
• Low self-esteem or feelings of anger about your appearance are the kinds of psychological problems.