Hemosiderin from the bruising post filler injection has been reported and it does tend to last for quite a while. form the picture it looks more like Lichen Planus. having said that, if you're unsure you can request your dermatologist to do a biopsy for you as that will provide you with the answer
Hemosiderin staining on lower lip after Juvederm injection?
Thank you for your question and I am sorry to hear of your pigmentation changes. Both hemosiderin staining of the lips and lichen plants are rare conditions and if your topical medication is not aiding in the appearance of your lips your dermatologist may want to perform a biopsy of one of the involved areas to have a histopathological analysis performed, hopefully providing a diagnosis and subsequent treatment recommendation.