Long-term dark circles under the eyes have a variety of triggering factors, not always caused by staying up late. If the dark circles are caused by staying up late, the symptoms can usually be relieved by ensuring a week of adequate sleep. First of all, unclean makeup removal, cosmetic residue in the eyelid area resulting in pigmentation, and improper use of eye cream and other creams, can lead to dark circles; secondly, long-term Internet access, cell phones, computers or television, resulting in visual fatigue, in the long run can also form dark circles; again, the diet of iron intake is too little, can also lead to dark circles; and smoking and alcohol abuse, lack of physical training, unbalanced diet are may all indirectly cause dark circles under the eyes. Therefore, if dark circles appear for a long time, it is recommended to improve daily habits, regular work and rest, ensure sufficient sleep; keep the skin around the eyes clean; healthy diet, balanced nutrition, etc.