Abstract Intravenous immunoglobulin (IVIg) is a frequently used treatment modality in the pediatric inpatient population for acute diseases such as Kawasaki disease and Stevens‐Johnson syndrome. There are few reported cutaneous adverse events after IVIg in the pediatric population. Here, we present two patients with psoriasiform dermatitis appearing after IVIg treatment for two different disease processes, Kawasaki disease and mycoplasma‐associated mucositis, suggesting an association with the treatment instead of the disease process.