A line under the eye is usually caused by skin folds in the lower eyelid area, which is related to localized skin laxity and excessive obesity. The subcutaneous tissue of the eye skin is relatively thin, and the skin is prone to aging and laxity, which results in the formation of skin folds. Once the skin in the lower eyelid area forms folds, it will result in the formation of a line-like appearance in the lower eyelid area, thus affecting the patient’s aesthetic appearance. In addition, if the patient is excessively obese, the accumulation of subcutaneous fat in the lower eyelid area will also push the skin to form folds. Due to excessive obesity, the patient just need to pay attention to diet control, more exercise, weight loss, the symptoms can usually be relieved on their own. For skin aging and sagging caused by, can be corrected through ophthalmic cosmetic surgery. Patients should visit the ophthalmology department of the hospital in time to find out the cause of the symptoms, and then the doctor will take targeted treatment.