Herpes labialis (cold sore) is caused by the herpes simplex virus. Cold sores commonly appear on the edge of the lip. This virus exists in a dormant state in the spinal cord nerve cells, and after certain environmental triggers like a sunburn or a cold, the virus is induced to travel along a peripheral nerve to the same skin site over and over again. The eruption is self-limited to about seven to 10 days so that treatment is unnecessary unless the eruption becomes too frequent.
Athlete’s foot (tinea pedis) is an infection of the dead superficial layer of the skin called the stratum corneum by a fungal mold called a dermatophyte. If inflammatory, it may produce a blistering eruption which is quite itchy. Noninflammatory tinea pedis produces a dry scaling appearance and is frequently not very irritating. Tinea pedis is probably frequently contracted by walking barefoot in locker rooms. Topical antifungal creams are available over the counter and can be helpful in treating symptoms.
Rosacea is a chronic inflammatory condition of the face that is characterized by redness, dilated blood vessels, papules, pustules, and occasionally by the overgrowth of nasal connective tissue (rhinophyma). It superficially resembles teenaged acne, but it occurs in adults. Persistent facial flushing is an early sign of the skin’s uncontrolled sensitivity to certain naturally produced inflammatory chemicals. Treatment of rosacea involves topical and oral drugs.
This form of folliculitis occurs in areas of the skin in which hairs have been recently cut or extracted. This is commonly present in the beard area of individuals with very tightly coiled hair. When the hair is cut off or plucked out below the level of the follicular pore, it tends to curl into the side of the follicle and cause an inflammatory bump. Not shaving closely is very important in preventing this form of folliculitis.
Skin tags are small, fleshy, fibrovascular, pedunculated (on a stalk) growths that are often are found on the neck and armpits. They are generally asymptomatic unless they become irritated by frictional forces or their blood supply becomes compromised. They are very common and need not be removed or destroyed unless they become irritated.
Acne vulgaris is a noninfectious eruption of papules and pustules on the face and occasionally on the chest and back. It occurs in all teenagers as they progress through puberty. Comedones (blackheads) and inflammatory papules and pustules are all present simultaneously. This is not a condition of dirty skin but is mediated by hormones that begin to circulate during puberty. The condition generally resolves around the age of 20 but may produce scarring if severe and left untreated.
Although the term mole may cover a variety of different sorts of skin growths, most often it refers to a localized accumulation of pigment-producing cells called melanocytes. These are generally uniform in color and round in shape. Melanocytic nevi (moles) range in color from beige to black, they’re <½ inch in diameter, and are often located on sun-exposed skin. Poorly pigmented individuals may have an average of 35 of these growths by the time they are 35 years old. These are benign lesions but can be confused with various pigmented skin cancers. Pigmented lesions that itch, bleed, or grow could be cause for concern.
The development of small keratotic tumors of the skin is caused by one of about 200 members of the human papillomavirus group. They often spontaneously go away, but particularly stubborn warts may require medical intervention. The proliferation of various treatments reflects the fact that successful resolution mostly depends upon the patient’s immune response. There are a variety of treatments available without a prescription that ought to be tried prior to seeing a physician.
Age or Liver Spots
These flat brown spots are caused by sun exposure and typically appear on the face and forearms. Although they cause no symptoms, patients detest them because of their unsightly appearance. They can be treated in a variety of ways, but patients must limit their exposure to ultraviolet light to prevent recurrences.
This condition occurs most commonly in women of childbearing age and is often associated with pregnancy or the ingestion of oral contraceptive medication. This flat brownish pigmentation occurs on the forehead, cheeks, and in the mustache area of the upper lip. It often persists after pregnancy or after birth control has ceased. Sunlight will make it darker. Successful treatment is not easy, and strict sun avoidance is a necessity.
This rash usually begins in a young adult as a single scaling bump or patch and then extends to cover much of the torso with hundreds of scaling spots that are elliptical in shape. They are associated with modest itching which only occasionally requires treatment. The condition usually lasts about nine weeks in total. Blood testing may be required to diagnose pityriasis rosea.
This is the single most common benign bump present on human beings as they age. Lesions may be present anywhere on the body and generally do not produce symptoms. They appear as black, brown, or yellow bumpy lesions which give the appearance of having been “glued” onto the skin. They are of no medical significance aside from the fact that they are occasionally confused with pigmented skin cancers.
Seborrheic dermatitis is the single most common rash of adult human beings. When it occurs in infancy, it is commonly called cradle cap. The adult disease tends to favor the scalp, skin behind the ears, forehead, brows, nasolabial folds of the face, mid-chest area, and the mid-back, producing an itchy, red scaling dermatitis. The scaling in the scalp can be conspicuous, producing impressive dandruff. The cause of this condition is unclear, but it responds well to topical steroids and to topical antifungal creams. Medicated shampoos containing tar, selenium sulfide, and zinc pyrithione are often effective. This condition commonly improves spontaneously but will ultimately recur. There is no cure so treatment must continue indefinitely.