Measles and hives are two completely different skin diseases. In terms of etiology, measles is caused by a viral infection, while hives are an allergic skin disease. Clinically, measles presents with diffuse red rash all over the body, accompanied by high fever and mucous membrane catarrhal symptoms, such as red eyes, excessive eye discharge, and so on. On the other hand, hives present with wheal-like skin lesions. Wheals refer to pale red or skin-colored raised lesions that can vary in shape and are usually quite large. They typically develop very rapidly and then subside within a few hours, with most wheals disappearing within 24 hours. Hives are also usually accompanied by severe itching.