Psoriatic arthritis belongs to a chronic inflammatory disease of the joints that is associated with skin diseases – psoriasis. It can affect one or more joints, and about 30% of psoriasis members develop psoriatic arthritis. At first, the sufferer suffers from pain and stiffness with arthritis, and the appearance of psoriatic changes on nails and skin is also typical. It most often appears between the ages of 20 and 40, and regardless of gender, it affects both sexes at the same time. One of the most important features of psoriatic arthritis is the ‘ sausage fingers ’ or dactylitis, which are common in the feet and, in a more rare case, on the hands. In addition to dactylitis, the occurrence of entesitis (usually Achilles ’ tendons) is common. The treatment depends on what stage the disease is, and on this basis it is determined by the medial therapy that is the most common in combination with physiotherapy to make the treatment more successful. It shall also be carried out separately, in particular with psoriasis and especially arthritis, and diagnosis is made on the basis of clinical picture of the disease and the examinations and findings made. Diagnosis of psoriatic arthritis is much more difficult because there are no certain diagnostic criteria, as is the case with other rheumatic diseases. Given the clinical picture obtained, in addition to the diagnosis, it is possible to determine what type of psoriatic arthritis is involved. There are classical and mutilating, and in the heavier form we include mutilating or destructive. In addition to the listed types of treatment, it is also important to educate the patient about the type of disease itself and to instruct him to change his way of life and adapt his life to psoriatic arthritis. If the disease is taken seriously and the treatment is treated on a daily basis, the treatment will be more successful.