Phototherapy techniques play an important role in the treatment of skin diseases. The main techniques are based on the use of different ranges of ultraviolet radiation: PUVA-therapy, UVB-therapy, UVA-1 therapy, and ultraviolet 308 nm excimer therapy. In clinical practice, the most widely used technique is narrow-band UVB 311 nm therapy possessing the best efficacy and safety ratio. PUVA therapy is used when other phototherapy techniques fail as well as in lesions with severe skin infiltration. UVA-1 therapy has well proven itself in the treatment of localized scleroderma and other scleroderma-like skin diseases. Ultraviolet 308 nm excimer light therapy is used for isolated dermatosis and enables treatment of single lesions using an optimal dose of radiation. The article presents methodical approaches to phototherapy, indications and contraindications for application, and early and long-term side effects.