Do I have a Negative Canthal Tilt? Or is one eye just Asymmetrical? (photos)

The suggestion to use sun screen is a sound one.  However, this could just be post inflammatory hyper pigmentation.  Often this will get better with sufficient time.  Let the dermatologist evaluate your concerns and see what is recommended for your particular situation.

Most expert experienced artistic plastic surgeons have a variety of procedures at their disposal to produce excellent cosmetic results in the appropriately selected patient: temporary fillers, micro-fat grafts, and blepharoplasties. There is no one best procedure. Each has benefits and ...

Hi I would definitely recommend thyroid tests - you may have an under active thyroid that could cause this appearance. As you have an atopic condition - this may contribute too.Festoons or malar bags can be challenging to treat - please do not get dermal fillers, as this can worsen the swelling.