Relaxers change the appearance of hair by altering its chemical makeup. During the relaxing process, the chemical bonds of the hair are broken then reformed into a straight, relaxed pattern.

Aussie shampoo is a popular hair product, but consumers should be aware that some ingredients in Aussie hair shampoo contain what may be considered harmful or toxic components, states the Natural Skincare Authority. While some of the contents of the shampoo created by Procter & Gamble are common, others are not.

Alopecia areata is a condition in which an autoimmune response causes hair loss. About 2 percent of Americans have some form of the disease, according to the National Alopecia Areata Foundation.

While perms can give flat hair body and movement, they also may leave it in need of some extra attention. Perms use chemicals to alter the shape of your hair; it might start with a smooth appearance, but will start to show signs of damage as your hair grows out.

Rashes, acne, boils or abscesses on the scalp can be alarming and painful--scalp skin is sensitive, usually protected by the hair above it. These conditions may be caused by ingredients in shampoos due to overuse, improper rinsing or an allergic reaction.

Many people cover up their gray hair with color, but gray can be gorgeous -- it just needs a little special care. Because gray hair is naturally thicker and coarser than other shades of hair, it may need more intensive or longer-lasting treatment to get the same results you got from products in your pre-gray days.

Heart disease is the leading cause of death in the United States, with 50 percent of those deaths men and 50 percent women, according to the Centers for Disease Control and Prevention website.

No matter how good commercial hair dye makes you look, it still contains chemicals your body doesn't need. Dye also tends to produce more intense colors than you may want. Herbs are both gentler on your hair and produce a softer, more natural tint.

Straightening curly hair requires damaging heated straighteners -- or so you thought. There are other ways to straighten your locks without a flat iron so you can give your hair a break from the heat once in a while.

Soft, shiny hair isn't just for the ladies. Some men may limit hair care to a dab of harsh, generic shampoo in the shower followed by a quick run-through with a comb, while others may opt for moisture-stripping hair gels or hot-blow-dryer styling techniques.

Whether you are bald by choice or experiencing premature hair loss, shiny scalp skin that reflects light like a mirror is frustrating. The shiny appearance occurs on top of the head because gravity pulls it down tight against the underlying skull.

Aloe vera juice comes from the aloe vera plant and contains 32 vitamins and minerals, 75 nutrients and hundreds of active enzymes. Many people associate aloe vera with treating burns and sunburned skin. While it’s great for these issues, aloe vera juice can also benefit your hair when applied topically.