The skin, also known as the integumentary system, is an essential part of the body. Skin is composed of three layers: the surface layer (called the epidermis), the dermis (middle layer) and the hypodermis (third layer). These skin layers contain fat, hair, sweat glands, nerves and blood vessels. Sometimes, the skin becomes itchy, changes color and develops rashes. Certain diseases happen in the integumentary system.
Pityriasis Rosea
The American Academy of Dermatology (AAD) says that pityriasis rosea is a skin condition in which scaly pink patches form on either the chest or back. They say that this type of rash is called a "herald patch," and it occurs commonly in people between the ages 10 and 35. Within the next fourteen days, this rash can form on the legs, arms and neck and takes on a Christmas tree distribution pattern. The AAD says that itchiness characterizes this disease in 50 percent of patients. Fatigue and aching are other physical symptoms of pityriasis rosea.
The AAD says that pityriasis rosea typically needs no treatment because it disappears within six to eight weeks. However, hot baths, anti-itch lotions and ultraviolet light treatments may help manage its manifestations.
Intertrigo
Intertrigo is a rash that occurs in the folds of the skin. According to FamilyDoctor.org, bacteria, yeast and fungus cause this particular rash. They indicate that overweight people, diabetic patients and people utilizing braces, splints and synthetic extremities are more likely to develop intertrigo.
Specifically, FamilyDoctor.org says that the rash is red and brown in color. Intertrigo usually occurs in the armpit regions, groin, underneath the stomach and breasts or in the skin folds of the neck. Sometimes, the skin may itch, bleed and exude a foul smell.
Treatment involves keeping the affected skin fold regions dry. Doctors may prescribe a topical steroid, antibiotic or fungal cream to get rid of intertrigo.
Lichen Planus
FamilyDoctor.org indicates that lichen planus is a skin disease in which red and purple bumps develop on the wrists, ankles and forearms. These bumps are flat and typically contain white scales or flakes. FamilyDoctor.org says that lichen planus can affect the scalp and cause hair loss (alopecia). It can affect the nails and cause them to be weak and brittle. Lichen planus may also affect the mouth or genitals and cause a burning sensation.
Typically, lichen planus will resolve by itself within a year. Physicians prescribe corticosteroids, light therapy and retinoid medications to treat it.
