What is the cause of pityriasis alba?
Doctors don’t know what causes pityriasis alba. It may be related to another skin condition called atopic dermatitis or eczema that causes a skin rash. People whose skin is very sensitive or who get a lot of sun may be more likely to get the condition.
What does pityriasis alba look like?
Pityriasis alba appears as several (2–20) light-colored (hypopigmented) patches ranging in size from 1–4 cm. The patches may have slight and subtle surface patches (scale). Occasionally, the condition begins as mildly itchy, pink patches that develop into lightened patches of skin.
What is pityriasis Amiantacea?
Pityriasis amiantacea is a condition in which there is excessive scaling of the scalp. Thick silvery or yellowish scales encircle the hair shafts and may bind down tufts of hair. The scales may resemble asbestos, giving rise to the term amiantacea – the French word for asbestos is ‘amiante’.
What is Sihuli disease?
This is a condition called Pityriasis versicolor is a common yeast infection of the skin, in which flaky discoloured patches appear on the chest and back. Pityriasis versicolor usually clears up quickly with treatment. But the skin patches may stay discoloured for weeks or months.
What is nevus depigmentosus?
Abstract. Background: Nevus depigmentosus is defined as a congenital nonprogressive hypopigmented macule or patch that is stable in its relative size and distribution throughout life. The pathogenesis and histopathologic characteristics of nevus depigmentosus is not yet fully established.
What causes dark patches on the upper arms?
This is a fungal skin infection that can cause patches of skin to become lighter or darker. These patches usually develop slowly and can sometimes merge to form larger patches. Tinea versicolor tends to affect the trunk, neck, and upper arms. Ringworm.
What causes scaling of the skin?
Scaling skin may arise when an injury or a medical condition damages the outer layer of skin. Some conditions interfere with the structure and moisture content of the skin or cause the body to produce extra skin, which can lead to dry or flaky skin.
What are the different areas of hyperpigmentation?
Areas of hyperpigmentation can appear on any area of the body, but they appear most commonly on the stomach and face. Sunspots. Also called liver spots or solar lentigines, sunspots are common.
Why do I have red spots on my armpits?
Candidiasis of the skin. This is a fungal skin infection that causes red, itchy skin patches. It often occurs in areas where the skin folds, such as the armpits and groin. In rare cases, skin cancer can cause patches of discoloration. Types of skin cancer include: