Classification of psoriasis

Itchy skin with psoriasis

The classification of psoriasis divides all forms of this disease into two main groups: pustular and non-pustular>.

Pustular psoriasis is relatively rare. Its development is possible after aggressive therapy in those who are already ill with a vulgar form of the disease or in healthy people.

Localized forms of pusular psoriasis

It is common to distinguish three types of psoriasis in this group:

  • Psoriasis on the background of psoriasis vulgaris that occurs after active treatment.
  • Barber pustular palmoplantar psoriasis manifests itself as a chronic form, during which the pustules take on the appearance of a brown crust, causing skin atrophy.
  • Pustular persistent acrodermatitis Allopo, localization of pustules on the fingertips. The causes of this pathology are unknown, and some doctors doubt the expediency of prescribing this psoriasis as a separate form.

Non-pustular psoriatic forms

Non-pustular forms of psoriasis are divided into several types:

  • The usual form of psoriasis (simple psoriasis vulgaris) is defined in patients with flat, small, pinkish-red plaque formations covered with characteristic scales.
  • Psoriatic erythroderma - psoriatic bright red compounds with silvery-gray scales occurring in any part of the skin, the skin becomes edematous, causing an increase in general temperature with extensive lesions accompanied by an increase in lymph nodes.

There are several forms that do not belong to either the first or the second group:

  • condition such as seborrhea;
  • Exudative non-pustular form;
  • napkin disease;
  • Atypical non-pustular psoriatic dermatitis localized on the flexed surfaces of the joints and skin folds.

Stages of psoriasis

Regardless of the diagnosis of psoriasis, the classification of stages in this disease coincides with the course of any disease, and the treatment of each stage is determined depending on the severity of each stage.

  • Progressive psoriasis. At the same time, the number of external manifestations is actively increasing, the number and size of plates is increasing. Their surface is loose and dry, and the borders tend to merge. The newly emerging elements get a weightless red border. The peeling period and the cessation of the formation of new plaques indicate that the disease has entered the second stage.
  • Inpatient psoriatic stage. External neoplasms that no longer increase in size lose their red borders. A little peeling begins.
  • Psoriatic regression stage. The number of boards decreases and peeling stops.

Classification of disease severity

Psoriasis - classification by severity provides the degree of symptoms and their area.

Based on this, they distinguish: light, medium and heavy.

Slightly, the clinical picture appears fuzzy, because if plaques are visible, there is a small amount. Itching and peeling are practically absent. The area affected by pathological external neoplasms is up to 3%.

The area of the moderately affected surface varies from 3 to 10%, and the ones mentioned in the previous paragraph are more progressive.

The strong phase passes with the defeat of more than 10% of the entire outer surface. The thickness and dimensions of the scales are much larger than in the middle stage. The skin is irritated, swollen and not elastic. External manifestations are accompanied by painful itching and peeling. If the joints are damaged, the patient's condition is considered serious.

To assess the severity, an index (PASI) is used, which indicates a joint assessment of the degree of manifestation of the pathology: the percentage of redness of the skin, itching, swelling and peeling. It has a linear scale shape from 0 to 72.

The classification of forms and types of psoriasis and its severity is somewhat arbitrary, the final point in the discussion of these issues has not yet been determined.