Simple / Mild Acne
Usually, during puberty, the rise in the level of hormones leads to the production of the oil by skin gland. This oil mixes when with the dead cells clogs the skin pores and leads to the development of acne. Acne is the bacterial infection that occurs inside the pores when sebum gets trapped. The symptoms are whiteheads, blackheads, and pimples. This common problem is usually treated with several months of treatment to clear the spots completely. Acne when Swells leads to the formation of acne scars. Once the spots are gone, you may need maintenance treatment for several years to keep the spots away. Small sebaceous glands which lie just under the skin surface makes the oil like sebum that keeps the skin supple and smooth. Now the pores on the skin allow the sebum to come on to the skin surface. During the teenage years, you make much more sebum because of the hormonal changes of puberty which stimulate the sebaceous glands. Hairs also grow through these pores.
Moderate / Pustular
Sometimes sebum under the blocked pores leads to pimples. Trapped sebum produces bacteria called Propionibacterium acnes. When the sebum trapped become very large in quantity, the immune system may react and cause inflammation. This causes the surrounding skin to become red and the spots become larger and filled with pus (or pustules).
Severe / Cystic
In some cases, the pus becomes even larger in quantity and form into small nodules and cysts.The area of skin that was inflamed remains discolored for several months after the inflammation has gone (post-inflammatory hyperpigmentation). Often easily noticeable in darker-skinned people. Also, a small pitted scar is commonly left on the skin where there was an inflamed spot.
Back Body / Chest Acne
It becomes all the more important to get rid of those ugly, painful boils as soon as possible. While the ones on the face are often a major concern, those that appear on the back and chest can be equally frustrating when it comes time to bare skin in the warmer months. Controlling the acne is possible once you know how it's formed and how to treat your skin for optimal health. It is hard to totally prevent any kind of acne as the hormones and genetics that are responsible, are not within your control.