Background: Cutaneous lymphoid hyperplasia (CLH) refers to heterogeneous group of reactive lymphocytic infiltration that clinically and histopathologically resembles cutaneous lymphoma. Objectives: This study investigated clinical and histopathologic characteristics of patients with CLH and analyzed the patients according to causes, infiltration cell type and histopathological findings. Methods: Fifty patients with cutaneous CLH were included. We retrospectively reviewed the medical records as well as histopathological and immunohistochemical staining. Results: The average of age was 53.2 and male to female ratio was almost 1:1. There was no significant difference between sex and clinicopathological features. When B cells were prominently infiltrated, it frequently showed nodular or follicular pattern while T-cell infiltration was predominant, diffuse pattern was usually found. CLH caused by hair dyes often formed lymphoid follicles, median age of patients was higher and skin lesions were located frequently on face. When drugs were culprit, skin lesions were located frequently on face and cells were located throughout the dermis. Conclusion: The CLH can be caused by a variety of agents and careful follow-up is necessary due to the risk of progression to lymphoma. Analyzing a relationship between causes of CLH and clinicopathological pattern can lead the patients to better outcome.