A nevus generally refers to a pigmented mole and an age spot refers to seborrheic keratosis. The nevus and age spot on the face are mainly different in terms of etiology, morphology and location. 1. Etiology: age spots are caused by skin aging and long-term sun exposure, and are commonly found in middle-aged and elderly people; nevus is a dark pigmented nevus, which is mostly caused by heredity. 2. Morphology: nevus manifests as a raised or flat patch or papule, part of which has hair growth on it, the number is uncertain, and the color can be brown, tan, flesh-colored, etc.; age spot can manifest as a round, oval brown patch or raised plaque, and part of the surface is papillae-like hyperplasia. 3. Part: nevus can be seen in all parts of the body, while age spots are commonly found in exposed parts, such as face and neck, back of hands, etc. It is recommended that the patient go to the hospital for an interview, and the doctor will judge whether it is a nevus or an age spot according to the morphology, and then carry out symptomatic treatment.