Hi and thank you for your question! With any concerns following fillers, you should contact your injector as they have accurate info on your treatment and they can provide appropriate care. This being said, swelling and bruising are fairly common after filler injections in lips and the pictures you posted are consistent with that. Bruising is caused by release of blood from vessels into the tissues and it has no lasting effects or concerns other than a discoloration that is temporary and self-limiting in patients with healthy coagulation system. Necrosis on the other hand is a far more serious condition in which tissues are injured and die (e.g. due to compromise of blood supply). The clinical picture is generally far more severe and might involve pain, more severe discoloration, wound, etc. Hence, a simple discoloration that is not associated with other signs or symptoms and is gradually improving should bot be a cause of concern after filler. Please make sure to do a follow up with your injector and good luck!
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