The lower eyelid holds fluid easily, so swelling here can last one to two weeks, longer than in most areas, and bruising through the thin skin is common. Gel sitting too close to the surface may show as a bluish shade, the Tyndall effect, or as a visible ridge, and lumps or a puffy look can appear months later. Correction with hyaluronidase is possible when needed. Rarely, injection into a vessel around the eye causes serious problems, so any pain or change in sight is treated urgently.
Collagen placed under the eye is injected through several points, each of which can bruise; discoloration here often takes ten days or more to clear. Mild swelling and small palpable bumps are usual in the first week. Because the product is collagen rather than hyaluronic acid, hyaluronidase will not remove it if the result is uneven. The effect on skin texture builds slowly and holds for roughly three to six months, so repeat sessions are part of the plan. Infection is rare.