Articles

  • Disease

    Acne

    Acne lesions frequently contain pus. This close-up photograph shows small acne pustules with surrounding inflammation (erythema).

    Acne is a skin condition that causes pimples or “zits.” Whiteheads, blackheads, and red, inflamed patches of skin (such as cysts) may develop.

  • Disease

    Acrodermatitis

    Gianotti-Crosti disease is also called acrodermatitis of childhood. These red, elevated lesions do not contain pus and can occur on the limbs, buttocks, face, and neck.

    Acrodermatitis is a childhood skin condition that may be accompanied by mild symptoms of fever and malaise. It may also be associated with hepatitis B and...

  • Disease

    Atopic dermatitis

    Keratosis pilaris occurs most commonly during childhood and produces small, rough spots. called papules, that are typically the same color as the skin. They usually appear over the outer surface of the upper arms and thighs, but may also occur elsewhere on the body. Dry skin, especially during winter months, makes the condition worse. Keratosis pilaris tends to be inherited and may be associated with atopic dermatitis..

    Atopic dermatitis is a long-term (chronic) skin disorder that involves scaly and itchy rashes. It is also called eczema. Other forms of eczema...

  • Disease

    Birthmarks - pigmented

    Mongolian blue spots are flat bluish- to bluish-gray skin markings commonly appearing at birth or shortly thereafter. They appear commonly at the base of the spine, on the buttocks and back and also can appear on the shoulders. Mongolian spots are benign and are not associated with any conditions or illnesses.

    A birthmark is a skin marking that is present at birth. Birthmarks include cafe-au-lait spots, moles, and Mongolian spots. Birthmarks can also be red.

  • Disease

    Birthmarks - red

    A stork bite is a vascular lesion quite common in newborns consisting of one or more pale red patches of skin. Most often stork bites appear on the forehead, eyelids, tip of the nose, upper lip or back of the neck. They are usually gone within 18 months of birth.

    Red birthmarks are skin markings created by blood vessels close to the skin surface. They develop before or shortly after birth.

  • Disease

    Boils

    At the base of the hair follicle are sensory nerve fibers that wrap around each hair bulb.  Bending the hair stimulates the nerve endings allowing a person to feel that the hair has been moved.  One of the main functions of hair is to act as a sensitive touch receptor.  Sebaceous glands are also associated with each hair follicle that produce an oily secretion to help condition the hair and surrounding skin.

    A boil is an infection that affects groups of hair follicles and nearby skin tissue. Related conditions include: Carbunculosis Folliculitis

  • Disease

    Cherry angioma

    The skin is the largest organ of the body.  The skin and its derivatives (hair, nails, sweat and oil glands) make up the integumentary system. One of the main functions of the skin is protection.  It protects the body from external factors such as bacteria, chemicals, and temperature.  The skin contains secretions that can kill bacteria and the pigment melanin provides a chemical pigment defense against ultraviolet light that can damage skin cells.  Another important function of the skin is body temperature regulation. When the skin is exposed to a cold temperature, the blood vessels in the dermis constrict. This allows the blood which is warm, to bypass the skin.  The skin then becomes the temperature of the cold it is exposed to.  Body heat is conserved since the blood vessels are not diverting heat to the skin anymore.  Among its many functions the skin is an incredible organ always protecting the body from external agents.

    A cherry angioma is a noncancerous (benign) skin growth made up of blood vessels.

  • Disease

    Contact dermatitis

    Poison oak rash on the arm.  Several plants produce toxins that cause skin reaction.  This is the appearance of poison oak dermatitis.  Note the typical linear streaks produced either by scratching or brushing against the plant.  (Image courtesy of the Centers for Disease Control and Prevention.)

    Contact dermatitis is a condition in which the skin becomes red, sore, or inflamed after direct contact with a substance.

  • Disease

    Dyshidrotic eczema

    The skin is the largest organ of the body.  The skin and its derivatives (hair, nails, sweat and oil glands) make up the integumentary system. One of the main functions of the skin is protection.  It protects the body from external factors such as bacteria, chemicals, and temperature.  The skin contains secretions that can kill bacteria and the pigment melanin provides a chemical pigment defense against ultraviolet light that can damage skin cells.  Another important function of the skin is body temperature regulation. When the skin is exposed to a cold temperature, the blood vessels in the dermis constrict. This allows the blood which is warm, to bypass the skin.  The skin then becomes the temperature of the cold it is exposed to.  Body heat is conserved since the blood vessels are not diverting heat to the skin anymore.  Among its many functions the skin is an incredible organ always protecting the body from external agents.

    Dyshidrotic eczema is a condition in which small blisters develop on the hands and feet. The blisters are often itchy. Eczema (atopic dermatitis) is a...

  • Disease

    Ecthyma

    Ecthyma is a skin infection similar to impetigo, but more deeply invasive. Usually caused by a streptococcus infection, ecthyma goes through the outer layer (epidermis) to the deeper layer (dermis) of skin, possibly causing scars.

    Ecthyma is a skin infection similar to impetigo. It is often called deep impetigo because it occurs deep inside the skin.