Detailed information on psoriasis, including causes, symptoms, diagnosis, and treatment

Ninety percent of oral cancer cases are caused by tobacco use. Oral cancer can affect the lips, teeth, gums, and lining of the mouth.

Bruises are a part of life. By the time you notice a bruise, though, it's already started to heal.

Most cosmetics have long shelf lives, but since they can be contaminated with bacteria after only one use, it is a good idea to keep track of how long you have been using products such as mascara and eyeliners.

As children, many of us were brought up with the notion that looking good meant lying out in the sun to achieve a tan. Little did we know the dangers of excessive sun exposure.

Skin problems such as pimples, blackheads, rashes, and oily skin are common in both teens and adults. But you don't necessarily need a dermatologist to treat them.

About half of people with nail problems have fungal infections. For some of these people, antifungal medications may help.

It's not the dust mite itself that causes trouble for people, but its shed skin and fecal matter. These substances bring misery to millions of allergy sufferers.

Detailed information on animal bites and rabies, including symptoms, diagnosis, treatment, and prevention

Detailed information on cat scratch disease, including symptoms and treatment

Detailed information on human bites, including treatment for human bites

You can get an infection whenever your skin is broken, whether it's a scraped knee or a gunshot wound. They always should be treated to reduce the chance of infection or scarring.

Detailed information on cold sores, including symptoms and treatment

Detailed information on acne, including causes, symptoms, and different types of treatment such as medication, dermabrasion, chemical peels, collagen injections, laser resurfacing, punch grafts, phototherapy/blue light therapy, and autologous fat transfer

Detailed information on blisters, including cause, first-aid, and treatment

Detailed information on folliculitis, boils, and carbuncles

Bruises form when blood cells seep from injured veins into surrounding skin tissue. Basically they are sores that don't break the skin. Newer bruises usually appear black and blue. As they heal they may look green and yellow.

Dandruff is a common problem, affecting about 20 percent of adults in the United States. Many people are embarrassed by dandruff, but it is not contagious and is fairly easy to control.

Atopic dermatitis is a hereditary and chronic skin disorder that mostly affects infants and young children, but may last until a child reaches adolescence or adulthood.

Detailed information on urticaria, also called hives, including what food and medicines commonly cause hives

Impetigo is a very contagious skin infection that can be spread throughout a household, with children reinfecting themselves or other family members.

Detailed information on lice, including diagnosis and treatment

Detailed information on Lyme disease, including symptoms, diagnosis, treatment, and prevention

Detailed information on poison ivy/poison oak, including symptoms, diagnosis, treatment, and prevention

Detailed information on scabies, including symptoms, diagnosis, and treatment

Detailed information sunburn, including symptoms and treatment

Detailed information on frostbite, including symptoms and what to do if frostbite occurs

Detailed information on bee sting and other insect stings, including symptoms and treatment

Detailed information on flea, mite, and chiggers bites

Detailed information on spider bites, including symptoms and treatment

Jellyfish deliver their venom through stinging cells on their tentacles. These stings produce a mild burning and stinging sensation and long, whiplike marks that develop on the skin. In most cases these stings can be treated using first aid.

Rosacea (pronounced roh-ZAY-shee-uh) affects millions of Americans, most of them between ages 30 and 50. The disorder usually begins with a tendency to blush easily, then progresses over several years to include persistent facial redness (inflammation) and tiny pimples on the forehead, cheeks and chin.

Detailed information on varicose veins, including causes, risk factors, symptoms, diagnosis, treatment, prevention, and full-color anatomical illustrations

If you notice your skin is tinged with yellow and the whites of your eyes have taken on a yellow hue, you might have jaundice. It's not a disease, but a condition of the body or a symptom that signals something is wrong.

Detailed information on cellulitis, including causes, symptoms, diagnosis, and treatment

Various conditions, ranging from pregnancy to menstruation and stress, can raise your body temperature and metaboloic rate and thus increase perspiration and ensuing body odor. Also, your diet can often sometimes enhance body odor.

The common black-and-blue mark linked with any bruise is particularly evident when it surrounds the eye. The dark-purplish circle, commonly called a black eye, signals a bleeding injury and will last a little more than a week.

Detailed information on bed sores, including causes, prevention, and treatment

Detailed information on shingles, including symptoms, diagnosis, complications, and treatment

Doctors usually treat ingrown toenails with a minor surgical procedure. After numbing your toe, your doctor will cut the nail and remove the part that's grown into the skin. In some cases, doctors use a laser or chemical on the area to prevent that part of the nail from growing back.

Detailed information on the most common types of ringworm, including diagnosis and treatment

A rash is an inflammation or infection of the skin. Most people have had skin rashes at one time or another. Rashes can have a number of causes, including allergies, irritants, or illness.

Chemical burns can occur when strong acids or alkalies come in contact with the skin and/or the eyes.

Most slivers are small wood splinters that do not penetrate deeply. Thorns, glass, or metal fragments can also be slivers. Slivers can be painful if pressure is applied to the affected area.

Detailed information on calluses and corns

Detailed information on the most common types of warts, including foot warts, flat warts, genital warts, and filiform warts

Rosacea causes redness, tiny bumps or pimples and small blood vessels to appear on the cheeks and nose.

Although the cause of rosacea is unknown, people with fair skin who blush easily may be at the greatest risk for it.

Detailed information on sebaceous cyst, including treatment

Most people who get cold sores were infected with HSV1 before age 20, usually by kissing someone with the virus.

Losing your hair can be a frustrating process, especially because you often have little control over it.

Detailed information on Lyme disease, including symptoms, diagnosis, treatment, and prevention

Detailed information on Rocky Mountain spotted fever, including symptoms, diagnosis, treatment, and prevention

Two types of spiders found in the United States can cause illness in people. One type is the widow spider, of which the "black widow" is the best known. The other type is the fiddleback or fiddler spider, of which the brown recluse is the best known.

Genital warts are caused by the human papillomavirus, the virus that also causes common skin warts.

Lyme disease is a tick-borne bacterial infection that most often targets the skin, joints, brain, and heart, although any part of the body can be affected.

Half of Americans experience some degree of hair loss. Hair loss affects both men and women, but with different results.

The varicella-zoster virus can get you twice. Its painful, long-delayed second strike is known as shingles.