Can Hyaluronic Acid Fillers Help my Scleral Show/Lower Eyelid Retraction?

You need to be seen by a doctor. Scleral show at a young age in the absence of eyelid surgery is a red flag for hyperthyroidism. If you really do have scleral show and have hyperthroidism ignoring the situation or injecting fillers is not what you need. The cornea is at risk of drying out and the hyperthyroidism will only get worse. See an internist or GP first. If your entire face is sagging you may have Romberg's which is a process where patients lose all their facial fat. Without a photo or face to face examination it is impossible to know what is going on or what treatment would be best for you.

It is difficult to be very specific in an answer to your question. A photograph would have helped. The short answer, though, is that fillers can help in selected patients.