Why do dark circles under the eyes occur?

The primary cause of dark circles under the eyes is the long-term accumulation of melanin. This buildup usually results from prolonged熬夜 (staying up late), sun exposure, eye inflammation, or the use of certain medications. Chronic insomnia can lead to excessive eye fatigue, contributing to the development of dark circles. Additionally, prolonged low mood or depression may also trigger their appearance. Therefore, it's important to practice self-care and emotional regulation in daily life. Using targeted eye creams designed to combat dark circles can be helpful, but most importantly, adequate rest should be prioritized—especially avoiding staying up late at night. If dark circles significantly affect appearance, photorejuvenation treatments can be performed under the supervision of a qualified physician. After treatment, strict sun protection is essential; wearing hats, sunglasses, and masks when outdoors can help prevent sun exposure from compromising treatment results.