Pityriasis

Pityriasis is a group of skin diseases characterized by the formation of thin pityriasis scales. Currently, this term is used only in combination with an adjective that defines it.

For example, seborrheic eczema (pityriasis alba) is a common disease in children characterized by the appearance of colorless, scaly patches on the face; these spots can also be a manifestation of atonic eczema.

The appearance of a rash in the form of spots or papules on the trunk and limbs (pityriasis rosea) is usually of viral origin; At first, the rash that forms looks like small single spots on the body (the so-called primary plaques (herald patches)), which soon turn into large oval pink scaly spots. Such spots often form on a person’s torso along the ribs. After eight weeks, the rash disappears without a trace.

Pityriasis versicolor (pityriasis versicolor) is a common chronic infectious skin disease caused by fungi of the species Pityrosporum orbiculare, which are usually always present on the scalp. In people sensitive to them, they can mutate, forming the pathogenic form of Malassezia furfur, which leads to the appearance of a colorless, scaly rash on the skin of the body. To treat the disease, a shampoo containing selenium sulfide (Selsun) is used; it kills the organisms that cause the disease, but restoration of normal skin color usually takes several months.

See also Dandruff (dry dandruff).

Pityriasis (lat. Pityriasis) is the collective name for a number of chronic skin diseases that occur with the formation of scales or crusts.

Pityriasis includes several diseases such as pityriasis versicolor, pityriasis versicolor and pityriasis rosea. The most common is pityriasis versicolor, which is caused by a fungus and is characterized by the appearance of white or yellowish scales on the skin. Tinea versicolor affects the scalp and face and appears as pink or red patches that may be covered in flaking scales. Lichen rosea appears as red patches on the skin that become flaky and scaly over time.

When treating pityriasis, you must contact a dermatologist who will conduct an examination and prescribe appropriate treatment. In some cases, antibiotics or antifungal medications may be required. It is also important to practice good hygiene and avoid contact with other people to prevent the spread of infection.

Pityriasis is a collective term for a group of skin pathologies with elements of peeling - lamellar or vesicular. The skin is inflamed and peeling due to impaired functioning of the sebaceous glands. Pityriasis is characterized by the appearance of small reddened areas and blisters on the body, which then merge into large lesions with a typical uneven pityriasis-like element. Seborrheic dermatitis is the most common of all types of pityriasis versicolor. Rare variety: exudative pterygium. The causative agents of the disease are microscopic fungi: Malasseia spp., which develop inside the hair follicles with increased secretion of sebum. It is caused by the yeast pityrosporonova, which is characterized by seborrheic peeling due to the lack of organic acids and amino acids. The lesion affects the epidermis, giving the dermis a yellowish-grayish appearance. Powdery pollen appears above the hair growth area, it is easily removed, rises and looks like scales. Most often develops on the head, ears and the surface above the upper lip, where especially the sebaceous glands