Should I get tear trough filler or something else? (Photos)

It is a little difficult not seeing your full face but you have some lines when you animate (which is normal) and they are likely accentuated when you are smiling. To further smooth them down, you can consider either filler or a light chemical peel, or even a resurfacing treatment with a device. Best to see an oculoplastic surgeon when it comes to your eyelids.

I believe we have seen 2-3 posts from you before about the same thing. you need to start in office lasers, plasmapen or microneedling. and at home peels and dermarolling.

at home peels like cosmelan, enlighten and aerify along with dermarolling (emerageskin 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 with or without fat pad repositioning will be the best long term. There are many things you can do to treat under eye hollows and dark circles without surgery. Non invasive less downtime options such as fillers, lasers, microneedling/PRP, cosmelan peels, and microneedling RF like Fractora or morpheus can all help give some improvement. Accutite can often be used or stronger lasers like erbium or co2 spot treatment can tighten the skin and give very quick improvement in wrinkles and texture. I suggest you get a formal consultation to see what is best for you and your goals. Best, Dr. Emer.