For the most part, when your hair turns grey depends on your genes. If your parents went grey in their 40s, odds are you will, too. In some cases, though, external factors can make your hair turn grey prematurely. Your hair gets its color from the pigment melanin. When the body stops making melanin or when melanocytes -- the cells that bring the pigment to hair and skin cells -- die, your hair begins to grey. While you can't change your genes, you can change your habits that put you at risk for grey hair.

Your eyelashes and eyebrows frame your eyes. When they become sparse, or you suddenly lose them altogether, it can be very stressful. Several underlying factors contribute to eyelash and eyebrow hair loss including medical conditions, stress and lack of proper nutrition. Knowing the causes and treatments will help keep you from panicking if it happens to you.

Being a mom usually means having less time for yourself. Many women find that motherhood means sacrificing many of the little extras such as beauty and hair treatments. If motherhood has begun to cramp your beauty regime, you may have noticed that your hair has suffered the consequences. By keeping a few basic tips in mind you can keep your hair healthy and still have time to run with the kids.

Having your hair braided is time consuming and can be expensive, but does allow you an easy-care, low-maintenance style while the braids are in place. Braids can be natural or created from hair extensions, and may look quite casual or formal, depending on the style you choose. The right care for your braids will help them last and look their best.

Oily or greasy hair often looks wet, flat and stringy, and can ruin an otherwise clean, well-kept, personal appearance. Overactive scalp sebum, which comes from sebaceous glands just under the scalp, produces the oily hair look. Sebum normally gives hair its shiny, soft glow, but too much of it may leave your hair greasy. Treatments for oily hair maintain healthy locks that present a polished look.

Long hair can enhance your style if it looks clean and well-kept. Unfortunately, dandruff can deter from the appearance of your hair. While dandruff is a scalp condition that can affect individuals with any length of hair, it can be more time-consuming to treat and prevent in longer styles of hair.

If you have your heart set on jet black hair, you can achieve this dramatic color change at home. Salon hair coloring can be expensive, particularly if you need frequent upkeep due to a significant color change. Black dyes can be blue toned, neutral, brownish-black or even reddish in tone, and will interact with your natural base color. With just a bit of practice, you can get glossy jet black hair in less than an hour in your own bathroom.

The thickness of the hair cuticle, which is the outer layer of your hair, determines how fine or coarse each strand of hair appears. While coarse hair may appear thicker and fuller than fine hair, it can also be difficult to style and keep healthy. Both chemical and topical treatments can help tame and enhance your coarse hair.

Whether you've been a long-time devotee of coloring or you feel like your first major dye job was a major mistake, you may find yourself wanting to recover the hair color with which you were born. Going back to your natural color can make your hair upkeep cheaper and easier, but doing it can be a little tricky. Unless you're ready to embrace the buzz cut, you can expect to deal with a fairly awkward growing-out period.

Few hair disasters are worse than a dye job gone bad. Even celebrities can fall victim to hair color mishaps. Glamour magazine cites Christina Aguilera's black and white skunk streaks, Rachel McAdam's bubblegum pink highlights and Scarlett Johansson's glowing, peachy-orange color as among the biggest celebrity dye job disasters. If you're coping with a hair color mishap, take heart. There are several ways to fix your hair color. And in the meantime, you can always invest in a cute hat to cover it up, if you must.