The objective of the work was to study modern clinical and anamnestic features of chronic lichenoid dermatoses. Materials and methods.Clinical and anamnestic examination of 100 patients with psoriasis and 80 patients with lichen planus (LP) was carried out. In both study groups, the majority were patients 51–60 years old, the minority – patients 31–40 years old. Among patients with psoriasis, men prevailed in all age groups, among patients with LP, men prevailed in the group of 20–30 years. Results. In the general gender structure, men prevailed in the group of patients with psoriasis, women prevailed in the group of patients with LP. Comparison of the anamnestic data regarding dermatoses revealed a chronic recurrent nature, characteristic of both psoriasis and lichen planus. According to the to the duration of the disease, among patients with psoriasis, the majority were patients with a long course of more than 10 years, among patients with LP – patients with a history of less than 1 year. In the group of patients with psoriasis, the majority were patients with early onset of dermatosis, in the group of patients with LP – with a late onset after 25 years. Annual manifestations of dermatosis were recorded in the vast majority of patients with psoriasis; in patients with LP, annual manifestations of dermatosis were recorded 12 times less frequently. A family history of psoriasis was found 10 times more often than in the LP group. In patients with psoriasis, compared with patients with LP, a greater relative number of long-term forms of dermatosis (38% of cases versus 22.5%), and early forms of dermatosis, which occurred before the age of 25 (52% of cases, versus 26.5%) were found. The leading provoking factor among patients with psoriasis was recognized as psychoemotional stress (61%), and among patients with LP, infections suffered the days before (49%). Also, in patients with psoriasis, obesity and overweight were recorded 5 times more often, cardiovascular diseases – 3.6 times more often, endocrine disorders – 2.4 times more often, concomitant pathology of the digestive system – 1.5 times more often than in patients with LP. At the same time, comorbital chronic infectious states were recorded more often in LP patients than in patients with psoriasis (31.25% of cases versus 22% of cases). Conclusions. The revealed results of the clinical and anamnestic characteristics of the studied groups turned out to be homogeneous in terms of age characteristics, heterogeneous in gender characteristics, trigger factors, comorbid pathologies, and multidirectional in terms of duration, manifestations and onset of dermatosis, which requires further study and systematization of key parameters.