Fillers are a great way to achieve more balance and definition to the face. You can start slowly with fillers and build up to the look you are wanting. The great thing about HA fillers is that if you are unhappy you can dissolve the product.
A responsible injector would not proceed with HA filler injections if hyaluronidase was not available for treatment of a vascular occlusion. Many alternatives to filler exist for rejuvenation that could be an option for a patient with hyaluronidase allergy including fat grafting.
At home peels like cosmelan, enlighten and aerify along with dermarolling (MTS roller with anteage MD ampules) should be started now. There are many things you can do to treat under eye hollows and dark circles. A surgical option to remove skin and/or fat will such as lower eyelid blepharoplasty...