Psoriasis is a common chronic, genetically determined, papulosquamous and psychosomatic skin disease. It is manifested by typical redness, thickening of the skin and silvery white bran, and dry scales. 1-3% of the world's population suffers from the aforementioned disease, while 1.7% of the population in the Republic of Croatia suffers from it. The first signs of psoriasis most often appear before the age of 25. Since psoriasis is a chronic disease that accompanies a person until his death, constant treatment is necessary. A common side effect of psoriasis is psoriatic arthritis, which affects as many as 30% of patients. Psoriatic arthritis is a rheumatic disease that belongs to spondyloarthrosis. It is most often characterized by cuboid fingers and chronic joint inflammation with pain and deformities. The treatment of psoriasis, as well as psoriatic arthritis, is a complex process that requires a multidisciplinary approach. Health experts from the fields of dermatology, rheumatology, psychologist, social worker, physiotherapist, nurses, and others participate in the treatment. Treatment is carried out using drug therapy, health care, physiotherapy, psychological help and a lifestyle change is necessary. Physiotherapy plays an important role in treatment because of all the physical agents that have beneficial effects on psoriasis and psoriatic arthritis. UV rays, naphthalene oils, electrotherapy modalities, and physiotherapy exercises are used.