Chin has become very red after using fillers. Is there anything I can do to fix the redness without losing the filler?

You did not post photos, but may have developed rosacea. I would suggest going to a dermatologist and be checked.

For unique cases where a variety of modalities could be used to treat the condition, I would suggest an in-person or virtual consultation to develop a custom and effective treatment plan. It is difficult to precisely define the best option without collecting the same information. I suggest reaching out to an expert for a consultation with surgical and non-surgical methods to get a comprehensive option. Best, Dr. Emer.

Hello and thank you for your question. We would always recommend a face to face consult however in this case a vascular laser may be a good option to help the surface redness.
We hope that answers your question. Best wishes