What should you know about Botox and under-eye filler?

Under-eye filler is commonly based on hyaluronic acid and is placed in or near the hollow beneath the eye to improve a shadow caused by reduced volume. It may soften the contour, but it cannot remove pigment, treat every type of puffiness, or erase fine skin lines. Botox works by reducing selected muscle activity and is generally considered for expression lines, not tear-trough volume. Under-eye filler can cause swelling, bruising, lumps, asymmetry, bluish colour, or fluid retention; the anatomy is delicate and needs experienced assessment.

See a qualified medical injector who examines skin tone, puffiness, facial anatomy, allergies, medicines, previous fillers, and eye conditions. Ask whether your concern is hollowing, pigment, swelling, or a combination. Discuss the exact product, placement, reversibility, aftercare, and review plan. Do not conceal new vision changes or an active skin or eye infection. Read about [Under-Eye Filler](/treatments/injectables/tear-trough-filler/), [Hyaluronic Acid Filler](/materials/hyaluronic-acid-filler/), and [Tear Trough Hollows](/conditions/tear-trough-hollows/).

Contact the injector promptly for increasing pain, redness, warmth, drainage, marked swelling, or a firm painful lump. Seek emergency care for sudden vision change, severe eye pain, pale or dusky skin, unusual headache, weakness, or other neurological symptoms after an injection. Do not wait for a routine review when vision is affected.

Is hollowing the main reason for my dark circles? Which product and plane would you use? How would you manage swelling? What symptoms require immediate emergency assessment?