Slice your hand in the kitchen or scrape a knee and -- pow! -- new lesions may appear where you were injured. This is called Koebner's phenomenon.

If a secondary infection occurs (usually from scratching), apply a local antiseptic lotion or antibiotic cream or ointment. Creams with corticosteroids and oral antihistamines may be advised in the presence of allergic reaction or larger skin reactions. In these more severe cases, you may need to see your doctor.

Between the fingers.The folds of the wrist, elbow, or knee.Around the waistline and navel.On the breasts or genitals.The head, neck, face, palms, and soles in very young children.

It typically appears on one side of the body or face. Other symptoms may include fever, chills, fatigue, and headache

Prompt treatment by a dermatologist can minimize scarring. In some cases, a doctor may inject corticosteroids directly into nodules and cysts to reduce the size and painful inflammation.

falls into the "mild" category if you have fewer than 20 whiteheads or blackheads, fewer than 15 inflamed bumps, or fewer than 30 total lesions.

They may appear anywhere and last minutes or days. Medications, foods, food additives, temperature extremes, and infections like strep throat are some causes of these. Antihistamines can provide relief

several non-contagious conditions where skin is inflamed, red, dry, and itchy. Stress, irritants (like soaps), allergens, and climate can trigger flare-ups

Often beginning as a tendency to flush easily, r causes redness on the nose, chin, cheeks, forehead, even the eyes. The redness may intensify over time, taking on a ruddy appearance with visible blood vessels.

It begins with redness and swelling at the contact site, then becomes intensely itchy with the development of blisters usually 12 to 72 hours after exposure

Triggers can include fever, too much sun, stress, or hormonal changes such as menstruation. Antiviral pills or creams can be used as treatment, but call your doctor if sores contain pus, there is spreading redness, you have a fever, or if your eyes become irritated.

People with curly hair are most affected by them. T

They're usually found on the neck, chest, back, armpits, under the breasts, or in the groin area

A fungal skin infection that can cause peeling, redness, itching, burning, and sometimes blisters and sores, is contagious, passed by direct contact, sharing shoes worn by an infected person, or by walking barefoot in areas such as locker rooms .

Usually brown or black, can be anywhere on the body, alone or in groups, and generally appear before age 20

These pesky brown or gray spots are not really caused by aging, though they do become more common as people age. They're the result of sun exposure, which is why they tend to appear on areas that get a lot of sun, such as the face, hands, and arms.

The rash may appear "Christmas tree" shaped across the body. The rash, whose cause is unknown, isn't believed to be contagious and can be itchy. It often goes away in 6-8 weeks without treatment

Caused by contact with the contagious human papillomavirus, can spread from person to person or via contact with something used by a person with the virus. You can prevent spreading by not picking them, covering them with bandages, and keeping them dry

Noncancerous growths that may develop with age

most common on the face, neck, armpits, shoulders, back, and buttocks. Hairy, sweaty areas are typical sites, as well as areas of friction

Bug bites, rashes, and other skin conditions can be confused with this because the symptoms may be similar: red, swollen, warm, or tender

common fungal skin infection otherwise known as tinea

precancerous condition that usually appears on the lower lips. Scaly patches or persistent roughness of the lips may be present

appears as a funnel-shaped growth that extends from a red base on the skin. It is composed of compacted keratin (the same protein in nails)

is also called squamous cell carcinoma "in situ." It is a type of skin cancer that spreads outward on the surface of the skin

can appear on the back of the neck ("stork bite"), between the eyes ("angel's kiss"), or on the forehead, nose, upper lip, or eyelids. Some fade as baby grows, but patches on the back of the neck usually don't go away

begins as a flat, pinkish-red mark at birth and gradually becomes darker and reddish-purple with age. Most will get bigger and thicker

It can be caused by sweating and the humid environment often created by athletic gear. You can prevent it by keeping your groin clean and dry, and wearing dry, clean underwear and loose pants after a workout.

Wear wide-toed shoes (so toes aren't crammed together), and don't share nail clippers

They may be red, purple, or blue and most often appear on the legs or face. They take their name from their striking spiderweb pattern.