Many people are unable to judge the type of spots by themselves, so that they blindly treat them wrongly and use spot removal products indiscriminately, resulting in the birth of several spots at the same time. Freckles/sun spots are scattered dark brown spots on the face and other places. After exposure to sunlight, X-rays, ultraviolet rays or even fluorescent lights, a large amount of melanin is produced, forming punctiform pigmentation. Freckles are hereditary and some are caused by sun exposure, so they are also called sun spots. Melasma is also called liver spot and butterfly spot, which is a pigmentation spot on the face. It is mainly caused by endocrine disorder, mental stress, various diseases, lack of vitamins and endocrine factors such as ovaries, pituitary gland and thyroid gland, and stimulation by external chemical drugs. Coffee spots are light brown to dark brown spots or patches, like the mixed color of coffee and milk, so they are also called milk coffee spots. They are similar to freckle-like spots of about 20cm or larger, round, oval or irregular in shape, with clear borders and smooth surface. Ota hemorrhoids Ota nevus is a pigmented birthmark characterized by greenish-brown nevus in the area around the eyes, which is common in Eastern ethnic groups (although sometimes it does not always appear at birth). V. Brownish-brown nevus Mostly occurs in females, the age of onset is mostly 16-40 years old, and some patients have family history. It is a deep gray-brown, dark gray or dark brown pigmentation spot, round, round-like or misshapen. Six, age spots Age spots, also known as age warts, is a very common benign skin disease in the elderly, early damage for flat papules or patches, skin color or brown. The surface is smooth, and gradually increases with age, forming a clearly defined spot, the surface can be slightly elevated, brown or black.