Which condition indicates the need for phototherapy in psoriasis treatment?

In the management of psoriasis, phototherapy is typically indicated when the condition significantly impacts a patient's physical or psychological well-being. This acknowledges that psoriasis can have a profound effect on a person’s quality of life, often leading to symptoms such as itching, discomfort, and sometimes even social isolation or depression due to the visible lesions.

When psoriasis reaches a level where it adversely affects a patient's mental health, self-esteem, or daily functioning, phototherapy becomes a valuable treatment option. This method not only helps improve the skin condition by reducing lesions but also serves to enhance the overall quality of life for the patient.

Other considerations in psoriasis treatment include the extent of the lesions and the effectiveness of topical therapies. If lesions cover less than 5% of the body surface area (BSA), or if topical treatments are effective, patients may not require phototherapy. In cases where there is no functional impairment, the necessity for more aggressive treatments like phototherapy is generally diminished. Thus, the significant impact on well-being is a key indicator for pursuing this treatment approach.