Spots under the eyes may be caused by chloasma, freckles, solar dermatitis, and other reasons such as age spots. 1. Melasma: Melasma may be caused by ultraviolet radiation, endocrine disorders, heredity and other reasons. Butterfly-shaped yellowish-brown or brown patches will appear on the cheeks and cheeks of the patient’s face. If chloasma appears under the eyes of patients, it will be manifested as localized spots. 2. Freckles: Freckles are considered to be caused by autosomal dominant inheritance, and patients will have light brown or brown pinpoint to rice grain size spots on the cheeks and nose. If patients have freckles under the eyes, they will have the symptom of spots under the eyes. 3. Solar dermatitis: solar dermatitis is caused by strong sunlight, skin exposure to the outside world for too long. Patients will manifest as diffuse erythema, hyperpigmentation, redness, swelling, blisters, burning pain in exposed areas. Erythema can leave pigmentation after recovery. 4. Other: patients with spots under the eyes are also considered to be caused by other diseases such as age spots and zygomatic nevus with brownish-bronze color. It is suggested that patients with long spots under the eyes need to seek medical treatment in time, and the doctor will carry out treatment after clarifying the cause of the disease.