The present authors report a 12-year-old Chinese child with generalized pustular psoriasis who was responded well to infliximab, but an adverse effect of herpes zoster occurred after the first infusion soon. The antiviral treatment was effective and no recurrence or flaring was observed after half-year of follow-up. This case reminds us to highlight the risk of viral infection during biological treatment on patients with psoriasis or autoimmune disease.