Dry skin can be caused by factors as diverse as extreme hot or cold weather and autoimmune system disorders. Frequently, dry skin responds to lifestyle changes and plenty of moisture, but in those with brown skin it can leave areas of hyperpigmentation.

The mental nerves, on each side of the chin, are the final branches of the lower part of the trigeminal nerve, and carry sensation from the chin. Since they're at the end of a very long route, diseases that affect the nerve anywhere along its path can result in numbness of the chin.

Acne can be unsightly and uncomfortable, but having it on the back of your neck can be particularly troublesome. Though common in teenagers, it can persist into adulthood for both men and women. It is most common in those who are physically active and sweat a lot, as the neck is where much sweat accumulates.

It's never perfectly smooth sailing when it comes to combating bumpy acne. But the good news is that there are definitive steps you can take to keep your skin clean so that pesky pimples can quickly come to the surface and heal.

Clearing away acne takes time, but you can reduce the redness so that a newly erupted blemish isn't quite so noticeable. The key to taking care of a blemish in the short term is to do so in a way that doesn't spread the bacteria inside the pimple to other locations on your face where they can take root.

The lily of the desert, the aloe vera plant, is a plant with topical and oral value. Both the gel and the juice are beneficial, but come from different parts of the plant and have specific and vastly different uses. Talk to a trusted health care adviser before using aloe vera as an oral or topical medicine.

Blackheads are stubborn and common -- a nasty combination when it comes to skin woes. Blackheads are formed when oil and dead skin cells become trapped in your pores. The plugs that form blackheads are sticky, so removing them can be a battle, and your skin-care routine can make matters worse.

The American Academy of Dermatology notes that acne, also known as acne vulgaris, is the most common skin condition in the United States. The AAD estimates 40 million to 50 million people a year experience acne, and the majority of those afflicted with the skin problem are teenagers and young adults.

When the collagen and elastin in your skin tear, it forms scars known as stretch marks. Many factors and conditions can cause the marks to form, including weight gain and pregnancy.

Vaseline traces its roots to the 19th century, when Brooklyn chemist Robert Augustus Cheeseborough first developed it as a natural remedy for skin abrasions in 1869. Petroleum jelly is a mixture of paraffin, microcrystalline wax and mineral oil.

It is always best let pimples heal on their own or consult a doctor to professionally remove a pimple to prevent bacteria from spreading on your skin. If you cannot resist the urge to pop a pimple, it is important to do it in the safest way possible.

People generally associate oily skin with acne, but dry skin can be a cause of breakouts, too. Acne occurs whenever the hair follicles in your skin get clogged. Though oil is a frequent culprit, dead skin cells, cosmetic products, dirt and bacteria also can clog your pores and cause breakouts.