Anything from a deep gouge to a light, seemingly harmless scratch can create a scar, which occurs when tissue forms over a wound that is healing. Most scars appear lighter in color than the unaffected skin around them.

The amount of damage that an acne lesion does to the skin's layers will determine if a scar will develop. If damage is done to the lower layers, the dermis, it is likely that acne scarring will appear.

Acne is problematic no matter where on the body it shows up, but when it takes over a highly visible area such as your chin, it can be quite irritating. Acne is the result of your body producing too much sebaceous oil.

Corticosteroid medications are derivatives of corticosteroid hormones produced by the adrenal glands, and they are available in topical, oral and injectable form.

Essential oils add fragrance to homemade body creams, soaps, massage lotions and other cosmetics. Most essential oils are too strong to apply directly to your skin. To avoid irritation, you'll need to dilute them with a carrier oil.

Clogged pores can cause blackheads, whiteheads or even skin infections. Oils, dead skin cells and debris can all clog pores. Keeping your skin clean is key, but finding the right cleanser may take some trial and error. This list provides you with some guidelines as to the best cleansers for clogged pores.

Calluses, the result of repeated friction, are the skin's way of building a protective layer. These thick, dry, yellowish patches usually appear on the feet or hands. Over time, calluses can become uncomfortably large and rough.

You can be forgiven for thinking that the skin on knees has no beauty treatments, but you can employ techniques to tighten the loose skin over your knees. The skin on your knees can sag for several reasons, but generally age is the culprit, with the skin losing its elasticity as you get older.

Controlling the actual size of pores is virtually impossible without laser treatments or strong, intense medications. While pores may shrink while taking a product such as Accutane, once you go off it, they generally return to their original size.

Aloe vera is renowned for its healing and soothing properties for the skin. It calms angry red skin, is cooling for allergic skin reactions, and heals skin affected by eczema, psoriasis and shingles. It is also very effective for the treatment of sunburn. The properties of essential oils have long been known.

Those lumps and bumps on your thighs and hips are called cellulite, an accumulation of fat beneath your skin. It is not a serious medical problem, but it can be embarrassing and make you self-conscious.

Pro-retinol is a trademarked name for a derivative of vitamin A marketed by the cosmetic company L'Oreal. It's used as an ingredient in topical anti-aging and wrinkle-diminishing creams and moisturizers.