Treatments · 5 min read
Under-Eye Bags, Hollows or Dark Circles? Three Problems, Three Answers
'Tired eyes' is a description, not a diagnosis. Under it sit at least three different problems, and treating the wrong one makes things worse.
The under-eye area generates more consultations, more disappointment and more corrective work than any other part of the face. The reason is that patients arrive asking for a treatment, usually filler, for a symptom, usually looking tired, without anyone having worked out what is actually causing it.
The three culprits
Hollows are a loss of volume in the tear trough, the groove that runs from the inner corner of the eye diagonally down and out. As the fat pads of the cheek descend and the bone beneath recedes with age, a shadow forms in the groove. In good overhead light it reads as darkness; in a photograph with flash it often disappears, which is the giveaway that it is a shadow rather than pigment.
Bags are the opposite: a bulge, not a hollow. The fat that cushions the eye pushes forward through a weakened membrane and sits as a puffy pocket above the tear trough. Bags are often worse in the morning and after salt or alcohol, and they are frequently inherited.
Dark circles are colour rather than contour. Sometimes genuine pigment in the skin, more common in darker skin tones. Sometimes thin, translucent skin through which the purple of the underlying muscle and blood vessels shows. Press gently on the area with a fingertip: if the darkness disappears, it is vascular; if it stays, it is pigment.
Most patients over forty have some combination, which is why a single treatment rarely solves the problem entirely.
Matching the treatment
| Problem | What helps | What does not |
|---|---|---|
| Hollow tear trough, good skin | Conservative filler with a cannula, or cheek filler first to lift from below | Filler placed too superficially (causes a blue tint and puffiness) |
| Bags (herniated fat) | Lower blepharoplasty (surgery) for significant bags; careful cheek support can camouflage mild ones | Filler in the trough, which adds volume to an area that already has too much |
| Thin, crepey skin | PRP injections, gentle microneedling, retinoid eye cream | Filler, which shows through thin skin |
| Vascular darkness | PRP, thickening the skin over time; caffeine and vitamin K topicals modestly | Bleaching creams, which target pigment that is not there |
| True pigment | Sunscreen, topical brighteners, gentle peels | Filler or PRP, which do not address colour |
| Fine lines when smiling | Very light neuromodulator in the crow's feet | Filler |
Why under-eye filler goes wrong
The skin here is the thinnest on the body and the tissue holds water readily. Filler placed too superficially, or in too great a volume, produces a bluish tint (the Tyndall effect), persistent puffiness, and a shelf-like appearance that can last for years because the area clears product slowly. Filler placed in a patient who actually has bags makes the bags look bigger. This is why I use a cannula, use small volumes, often treat the cheek before or instead of the trough, and decline to treat patients whose primary issue is fat rather than hollowing.
The role of PRP
Platelet-rich plasma, prepared from your own blood and injected into the under-eye skin, gradually improves thickness, texture and the crepey quality of the skin over a series of two to three sessions. It does not add volume, so it does not carry the risks of filler, and it is often my first recommendation for patients whose main complaint is the quality of the skin rather than a hollow. It can be combined with filler in suitable patients.
When to see a surgeon instead
If you have true bags, a distinct pocket of fat that is present in every light and does not change with the angle of your head, the honest recommendation is a consultation with an oculoplastic surgeon. Non-surgical treatment can soften the transition but cannot remove the fat, and I would rather say that at your first visit than after three sessions of something that was never going to work.
Common questions
What is the difference between under-eye bags and hollows?
Hollows are a loss of volume in the tear trough that casts a shadow. Bags are a bulge of fat pushing forward beneath the eye. Hollows can respond to conservative filler or PRP; bags are usually a surgical problem, and filler can make them look worse.
Does filler work for dark circles?
Only if the darkness is a shadow caused by a hollow. If it is pigment or visible blood vessels through thin skin, filler does not help and can create a bluish tint. Press the area with a fingertip: if the darkness disappears it is vascular, if it stays it is pigment.
What is PRP under the eyes?
Platelet-rich plasma from your own blood, injected into the under-eye skin over two to three sessions to improve skin thickness, texture and crepiness. It does not add volume, so it avoids the risks associated with filler.
Why does under-eye filler look puffy?
Usually because it was placed too superficially or in too great a volume, or because the patient had bags rather than hollows. The area clears filler slowly, so puffiness can persist. Dissolving with hyaluronidase corrects it.
Can under-eye bags be treated without surgery?
Mild bags can sometimes be camouflaged by restoring support in the cheek. Significant bags, present in every light, require lower blepharoplasty. A physician should tell you which category you fall into before any treatment.
Dr. Mazzuca is a licensed physician practising medical aesthetics in Markham, Ontario, with additional training in cosmetic medicine, facial anatomy, women's health, and longevity medicine. Every treatment at the clinic is performed by her personally. Her registration can be verified through the College of Physicians and Surgeons of Ontario.
Written and medically reviewed by Dr. Monique Mazzuca, MD, CCFP. Published September 11, 2026.
This article is general information, not medical advice, and it is not a substitute for an in-person assessment. Results vary between patients, and every treatment carries risks that are reviewed with you before you consent. Suitability is determined by Dr. Mazzuca at your consultation.
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