Despite the unknown etiology of psoriasis and the factors that caused it, the stages of its development are well studied.The classification of psoriasis at the stage facilitates the evaluation of the course of the disease, helps to identify sensitivity to a certain method of treatment and to determine the tactics of patients.

The steps of psoriasis are classified according to the nature of exacerbation (or the activity of the inflammation process) and gravity.
Steps of psoriasis according to exacerbation
Psoriasis is a disease that has 3 steps:
- progressive;
- stationary;
- Retrogressive;
- discount.
Progressive stage symptoms
This step is characterized by obvious signs of exacerbation.Several skin eruptions appear on the skin, having the shape of red nodules (papules, tubers) with an oval or rounded shape.They merge and form households occupying a large surface, their surface actively peels off, the patient experiences seriousness of the skin at the same time, and sometimes a burning sensation.The itching can be exhausting and disturbing the patient, not only during ordinary life, but even in a dream, taxes to intensify during contact with clothes.After the ladder shift, the surface can be wet and transform into a nutritious environment for the propagation of bacteria.
The main manifestations of the progressive stage are:
- The appearance of papules on the extensor surfaces of the limbs and on the body;
- The fusion of papules into conglomerates ("plates"), having a whitish color;
- peeling of the surface of the conglomerates;
- There are no scales in the region of the plates, but there is a hyperemic edge;
- The edges of the plates are compacted;
- The presence of a Kebner phenomenon: when mechanical damage (coupe, scratches) appear on uninhabited skin, a new psoriasic plate is formed in its place.
The more intense the progressive stage, redness of the skin is, the more active the inflammation process.The most dangerous consequence of psoriasis is psoriatic arthritis, while serious joint pain occurs, therefore, the joints are distorted.

Stationary stadium symptoms
With the start of the stationary stage, progressive attenuation of the exacerbation process occurs.At the same time, the papules pale, they turn from red into pink, new rashes at this period do not appear.The surface of the nodes has the shape of "plates", it is dense, covered with a crust, which is represented by many dried skin scales.The nature of papules healing begins from the center to the outskirts.The presence of a stationary psoriasis stadium confirms the effectiveness of treatment.
The main demonstrations of this stage are:
- lack of skin rashes of new papules;
- Existing plates stop their growth;
- The surface of the plates is covered with scales;
- The red edge disappears around the puff pastry;
- Kebner's phenomenon disappears.
Symptoms of the regression stage
At the stage of regression, the process is involution.The "plates" are resolved, forming areas of skin depigmentation.The itching of the skin gradually disappears, the signs of discoloration of the decline.
Signs of regression of psoriasis:
- There is a voronov rim around the plates (dense folds visible in ring located around psoriatic plates);
- Reduction and gradual disappearance of the coat;
- On the plaques site, depigmenting areas (white or dark) are formed.
At the stage of regression, the plates disappear completely, the remains of plates are possible in the region: knees, elbows, abdomen, buttocks.
Discount
Remission is the stage of apparent recovery.During the remission, psoriasis is in a state of "sleep", but does not disappear from the body.The remission of psoriasis lasts until the next exacerbation (progressive step).

It should be noted that during the exacerbation of psoriasis, the general condition of a person does not change, he will work, is engaged in familiar questions.Psoriasis brings only a aesthetic and cosmetic defect to a person: the patient's skin is scratching a lot, a person cannot wear open clothes, if an exacerbation is observed in summer, a person cannot visit the pool, go to massage, cosmetic procedures, etc.
Steps of psoriasis according to the zone of the lesion
The severity of psoriasis also depends on the area of skin lesions.Thus, at a light stage, only 3%of the surface of the skin is affected, with an average - from 3 to 10%, and with a heavy - more than 10%.Psoriasis, which has caused damage to the joints, belongs to a severe degree, in which case the area of skin lesions is not taken into account.You can measure the damage area yourself.To this end, the open palm rule is used (the skin of the skin corresponding to the human palm area is 1% of the entire surface of the body).
PASI index
The general system to assess the severity of psoriasis is evaluated using the PASI index, which includes an assessment of prevalence and severity, as well as the severity of the manifestation of the disease.This indicator is estimated from 0 to 72. At the same time, the light degree of psoriasis has an indicator of less than 10, the average - from 10 to 20, the heavy - more than 20. Using the PASI index, the clinical efficiency of the treatment is also calculated.
In addition to different stages, psoriasis can have different types: seborrheic, exudative, plantar, intertriginous, old, rupioid, interrupted, psoriasis of nails and mucous membranes.It is impossible to completely cure psoriasis, but you can get a long remission.It is this objective that is pursued by modern treatment methods.