How to Treat Under-Eye Hollows | Fillers, Home Care, and Surgery

Shadowing beneath your eyes is often a signal, not a flaw. What looks like a dark circle may actually be a hollow — a shallow depression that develops as facial fat and collagen shift with age. The right way to treat under-eye hollows depends entirely on whether you’re dealing with skin quality, volume loss, or true eyelid puffiness. Here’s how to tell the difference.

What Causes Under-Eye Hollows?

Under-eye hollows are the shadow-casting depressions that form along the tear trough, the groove running from the inner corner of the eye diagonally toward the cheekbone. As we age, the skin thins and the fat that supports the lower eyelid shifts downward, deepening that groove and creating a shadow.

The Mayo Clinic notes that what looks like dark circles may actually be shadows cast by these hollows. Other contributors include genetics, sun damage, sleep deprivation, and dehydration — each of which affects how noticeable the hollows appear. Treating the source of the shadow matters more than just camouflaging it.

Before considering any medical procedure, the Mayo Clinic recommends trying at-home steps first. These are the measures that genuinely reduce the look of shadowing for many people, though they cannot restore lost volume.

• Cool the area. A cold, wet cloth, a chilled teaspoon, or a bag of frozen peas wrapped in a soft cloth can constrict blood vessels and reduce the shadow created by puffiness.
• Elevate your head. Sleeping with extra pillows reduces fluid pooling under the eyes overnight.
• Sleep more and limit alcohol. Both affect fluid retention and skin tone, making hollows look deeper.
• Use broad-spectrum SPF 30+ sunscreen daily. Sun damage thins the skin and accelerates the collagen loss that deepens hollows.
• Address underlying skin conditions.
• Stop smoking. Smoking breaks down collagen and worsens skin quality around the eyes.

These steps improve skin quality and reduce puffiness, but they cannot fill a structural hollow. If several weeks of consistent home care leave the shadow unchanged, the depression is likely volume loss that needs a different approach.

When Is Filler the Right Treatment?

Injectable hyaluronic-acid fillers are the most common medical treatment for true tear-trough hollows. The Mayo Clinic states that injectable fillers can smooth the hollows that cause shadows, and a peer-reviewed review in PubMed Central confirms low-viscosity hyaluronic acid is suitable for tear-trough correction.

The procedure works by replacing lost volume at the correct depth. The clinical guide is specific: injection should occur at the supraperiosteal level along or below the orbital rim, using a low-viscosity product. High-viscosity fillers and nonbiodegradable agents should never be injected in this delicate area, and the clinician must protect the orbital rim edge and stay cautious around the infraorbital foramen.

Candidate selection matters as much as technique. Tear-trough filler is appropriate for a deep medial groove with true volume deficit and shadowing — not for dark circles caused primarily by pigment, edema, or skin laxity. The peer-reviewed protocol is blunt: pigment-related dark circles are not improved by filler. If your issue is brownish or bluish discoloration rather than a hollow you can feel with your fingertip, filler will likely disappoint.

Typical initial dosing runs 0.1–0.3 mL per side, with reassessment at 3–4 weeks before adding another 0.05–0.2 mL. Results are not final until several weeks after treatment, so assessing or topping up before 2–3 weeks is a recognized mistake. Overcorrection is the most common aesthetic error, which is why conservative placement is the standard of care.

Absolute contraindications include pregnancy, lactation, active local infection, known HA or lidocaine allergy, severe immediate hypersensitivity, acute sinus or orbital infection, and active herpetic lesions.

What Are the Alternatives to Filler?

Filler is not the only medical option, and it is not always the best one. Platelet-rich plasma (PRP) injections are another treatment the Mayo Clinic lists, using your own blood’s growth factors to improve skin quality. Laser resurfacing and chemical peels can thicken and tighten thin under-eye skin, which helps when sagging rather than volume loss drives the shadow.

When eyelid puffiness — not hollowness — is the primary complaint, the Mayo Clinic notes that bags under the eyes are usually cosmetic, and eyelid surgery (blepharoplasty) may be appropriate depending on the cause. Surgery removes or repositions excess fat and skin, which is the opposite problem from a hollow.

The medical review is clear on expectations: low-viscosity hyaluronic acid is effective for tear-trough correction, but technique is critical because the area is anatomically delicate. Choose a clinician who injects the periorbital area regularly and discuss your specific anatomy before committing. If your main concern is improving skin quality rather than restoring volume, a good under-eye cream can support skin thickness and hydration as part of a home-care routine.