Fatigue can manifest as dark circles, puffiness, or fine lines under the eyes. This is due to the skin around the eyes being much thinner and more sensitive than skin elsewhere on the face. The delicate nature of this area makes it particularly susceptible to showing signs of tiredness and stress. These visible changes are common when individuals are sleep-deprived or experiencing exhaustion. Understanding this sensitivity is key to addressing and managing the appearance of dark circles. The area's vulnerability means even minor factors can contribute to discoloration and texture changes.