Spots on the face and arms may be due to the appearance of melasma, freckles and age spots. Chloasma mostly occurs on bilateral cheeks, chin and forehead, and is mostly distributed symmetrically. The causes may be related to pregnancy, menstrual disorders, long-term use of contraceptive pills, poor mood and endocrine dysfunction. Symptoms are aggravated after exposure to sunlight. Freckles are commonly found on the face, manifesting as isolated, non-combined yellowish-brown or brown pigmented spots. It has a family history, and its onset is also related to sun exposure, aggravated in summer and alleviated in winter. Seborrheic keratosis is an important sign of skin aging and occurs on the scalp, face, upper limbs and trunk. Age and ultraviolet radiation are the main triggering factors for this disease, followed by chronic inflammatory stimuli, viral infections, heredity is also related to the onset. It is recommended to go to a regular hospital in time for treatment after symptoms appear.