I've had malar bags for a couple of years now. Is there a way that I can treat them for a youthful appearance? (photo)

Dear Vancouver,It appears from your photos that you have evidence of fullness in the lower eyelid region and festoons/malar mounds on the cheek as well.
These changes can make a person appear tired, sick and older even when they feel fine inside. 

The best options would be surgery to remove or relocate the fat in this region and a procedure to improve the skin quality in the lower eyelid at the same time.

Festoons and Malar mounds are difficult conditions to treat but I've had success using laser to help with this condition.

I'll include some links below.

I hope this was helpful.

Thanks For your question and for submitting your photos it really helps. 
Your Right you have malar bags. These are fluid collections in the upper cheek that occur in many people. Allergies medications etc can influence their appearance. And as you know the size of the bags varies from day to day. They generally look the worst on the days when you have something important like a job interview. 
Fluid retention, salt intake and sleep can impact the appearance of malar bags. There is no good surgical intervention for this, but some non surgical treatments can help. I would see your allergist first and get some insight into what your may be reacting to. We often camouflage the area below the bag with fillers like Restylane and some laser treatments can improve the area slightly. Lymphatic massage to decrease the fluid accumulation has a fairly instant although short term effect.
Good luck!

Hi LC.  In the first photo (yellowish lighting), you can see that the indentation you are concerned about is an extension of what we call the nasojugal groove, which starts at the inner corner of the eye.  This groove is present at the transition of the skin from the cheekbone to the fat that surrounds the eye.  To make this transition look smoother, and to fill the dimpled area below the cheekbone, consider a dermal fillers such as Restylane or Juvederm.  These are Hyaluronic Acid based fillers that work very well for the concern you have.  To see an example of what dermal fillers in this area can do, click on the link below for before and after photos.