Most people leave with nothing worse than a bruise. The expected effects are bruising, swelling, redness and tenderness at the injection points, sometimes lasting several days. Beyond that, patients can develop palpable lumps or nodules, an uneven contour, gel migration away from where it was placed, a bluish tinge where product sits too superficially, a delayed inflammatory reaction weeks or months later, and infection at an injection site.
The serious complication is vascular: gel entering or compressing a blood vessel and interrupting the blood supply. Skin can be lost where the vessel supplied it, and injection around the face has been linked in the ophthalmologic literature to visual loss, so every patient here is told the warning signs without being asked. Sudden severe pain out of proportion to the injection, pain at a distance from the treated site, blanching or mottled purple discolouration of the skin, and any change in vision — blurring, a dark patch, double vision or pain behind the eye — mean you contact the clinic immediately and attend without waiting. Speed of recognition is what changes the outcome.
This is also why hyaluronidase, the enzyme that dissolves hyaluronic acid gel, is held on site and why the directors work in small increments with the anatomy of the danger zones in mind. Tell the clinic your full medical history, your medications and supplements including anything that thins the blood, and every previous injectable treatment you have had anywhere on your face, including products injected elsewhere.