Understanding the tear trough and under-eye hollows

The tear trough, the hollow that runs from the inner corner of the eye downward, is a common cosmetic concern, casting a shadow that reads as tiredness, and understanding it explains where under-eye filler fits.

The tear trough deepens with age as the face loses volume and the fat pads around the eye shift and descend, creating a hollow or groove that casts a dark shadow regardless of skin color. This structural shadow is distinct from pigmented dark circles (brown discoloration) and from vascular circles (thin skin showing blue veins), and it is the structural, hollow type that under-eye filler addresses, by restoring volume to fill the groove and soften the shadow. Filler does nothing for pigment or for a fat bag, which is why diagnosis of the cause matters before treatment.

For genuine tear-trough hollows, carefully placed hyaluronic acid filler can be transformative, smoothing the transition between the lower lid and cheek and reducing the tired shadow. But the under-eye is one of the most delicate and unforgiving areas to treat, and not everyone is a candidate, those with significant under-eye fat bags or fluid retention often do better with other approaches. The starting point is identifying whether your under-eye concern is a true hollow (which filler suits), pigment (which needs brightening), or a fat bag (which needs surgery), since the right treatment depends entirely on which you have. If filler is not the answer for your particular shadow, there are several alternatives matched to the cause.

Related reading: Surgery vs. filler for the under-eye: choosing right.