Why do tear trough hollows cause dark circles?

A tear trough is a natural groove that runs from the inner corner of the eye along the lower eyelid. When the groove is pronounced, light reaches it unevenly. The upper edge may project a shadow onto the hollow, while the nearby cheek appears brighter. This contrast can give the under-eye area a brown, blue-grey or dusky appearance even when the skin has not changed colour.

Thin lower-eyelid skin can make blood vessels show through more clearly, adding to the impression of darkness. Rubbing, allergies, tiredness and sun exposure can also alter the appearance, so a hollow is only one possible contributor. Most people with Tear Trough Hollows notice dark circles, but the depth and colour vary between people.

Notice whether the darkness changes with lighting, facial expression, sleep or congestion. Gentle cleansing, daily sun protection and avoiding eye rubbing can reduce extra irritation. A clinician can assess whether the main issue is a hollow, pigmentation, visible vessels, swelling or a combination. Options may include skincare for surface colour or a procedure aimed at the contour; the suitable choice depends on eyelid anatomy, skin type and eye health.

Arrange an assessment if the change is new, strongly one-sided, associated with pain, marked swelling, redness, vision changes or a rash. These features may point to an eye or skin problem rather than a simple contour shadow. Seek urgent help for sudden vision loss, severe eye pain or rapidly increasing swelling.

Ask whether the appearance is mainly caused by a hollow, pigment, vessels or puffiness; whether allergies or rubbing are contributing; which treatments suit the thin under-eye skin; and what warning signs should prompt review.