For each patient, one side of body will be treated with NB-UVB alone while the other side will be treated with NB-UVB therapy in addition to intradermal injection of PRP every 2 weeks. Patients will be photographed at the first visit, in the middle and at the end of therapy. Each patient will sign a written consent form to be included in the study and to be photographed.

Inclusion Criteria:

Patients with stable non segmental vitiligo. (Absence of koebnerization, absence of new lesion and absence of widening of the existing lesions).

Patients have more than 15 years.

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Exclusion Criteria:

Patients have active vitiligo (appearance of new lesion, history of koebnerization).

Pregnant and lactating women. History of keloid formation. Anemia (hemoglobin level <10gm/dl), thrombocytopenia (platelet count <100,000 /µL), coagulopathies or patients on anticoagulant therapy and patients with iron deficiency.

Patients taking drugs that prolong bleeding time such as Aspirin and vitamin E Patients taking treatment of vitiligo in last 2 months

Researcher shall pubish in national journal