What I think are malar festoons appeared very suddenly over my left cheekbone. Could I fix it myself? (Photo)

What you are noticing are not malar festoons. There are nasojugal grooves also known as 'tear trough.'The best solution for a young person like you is get a filler in this area and also get laser tightening of the skin in the area. RegardsDr. J

Agree that these are NOT festoons. You would be a good candidate for filler to address the volume deficiency. You would also be a good candidate for skin resurfacing to address pigmentation and texture changes. I recommend you see an eyelid or facial expert in your area to address your concerns.

This condition can be seen in such an early age in patients who have small cheek bones (malar hypoplasia). Improvement can be achieved by means of transconjuctival lower blapharoplasty, to release muscle and ad some volume by means of small fat flap underneath the groove. Correction with small implant or fat grafts may also be considered in selected patients. Fillers may also be used as a first step but, unfortunately, it will not solve the problem permanently. In person consultation with a board certified plastic or occuloplastic surgeon with good reputation in peri-orbital rejuvenation, facial implants and fat grafting is recommended. Good luck.

This subtle hollowness is due to lack of volume and is very common. The technical term for this is Orbito-zygomatic groove and even young people have this anatomic feature. Fillers are ideal in this area, Restylane or Radiesse work very well with minimal swelling. 

This is not a festoon, this is a crease under your eye which many younger people have and can be influenced by age or weight changes.  Also you have dark circles that can be improved.  Fillers and peels will help most for this. you will never "cure" this you will always have but will be improved with noninvasive treatments.  An at home peel, and at home roller protocol will help to improve color and tighten this area.
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 be the best long term.  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 be the best long term.  However, non invasive less downtime options such as fillers, lasers, microneedling/PRP, cosmelan peels and stem cells can all help give some improvement. I suggest. You get a formal consultation to see what is best for you and your goals.  Best, Dr. Emer.

This is a mid cheek groove. A small amount of hyaluronic acid filler would address this. Don't waste your time with PRP or micro needling. Don't get talked into grafted fat which is like injecting the cheek with scar tissue and will cause long term harm.

I believe fillers and PRP with Nano fat can do much better for you than lasers. SInce you are so young, I believe you need to have a stronger mid-face. We have been very successful to repair the malar festoons with nanofat and PRP and fillers. Please, follow me at  #beautybyDrRostami on IG.
thank you,

Festoons are typically genetic.  They are difficult to treat, but some patients find improvement with lasers.  Another option may be FaceTite with Morpheus8 treatments. Using medical grade skin care products and to wearing sunscreen every day is encouraged.

What you have is NOT a festoon, which has a very specific cause and presentation. Instead, you have a congenital depression caused by the specific attachment of the muscles and ligaments around your lower orbital bone. There is nothing you can on your own do to improve it. Treatment is filling the area with either a heavy filler like Juvederm Voluma or Radiesse to with fat grafting (and, yes, fat grafting, when done by an expert, works exceptionally well and lasts significantly longer than the off the shelf fillers). Either way, you need an expert in the area, more so for congenital problems than ones from aging.