What happens if you don't get fillers (Voluma) redone?

Thank you for your question.  Based on what your are wanting to try, Voluma will not cause stretching of the skin to the point you develop increased laxity after it is gone.  However, whether you have Voluma or not, you will continue with the aging process which often entails developing more tissue laxity, loss of tissue support and thinning of the tissues.  I would recommend that you go to a board certified plastic surgeon or dermatologist who can help you with your concerns.

Voluma is approved for cheek (malar) augmentation and is firmer than some of the other 'HA' fillers and usually lasts longer. Being in one's "20s" with a desire to have a more rounded face can be a good thing, so a younger age is not a negative. Like all fillers it is important that a proper volume is used (not too much, not too little) and that it is placed in the ideal place (not too superficial or too near the eyes). Remember that while the filler have been very popular, there are pros & cons to all fillers and there can be risks and unwanted sequelas, so carefully discuss this with your physician beforehand. 

I recommend scheduling a consultation with a board certified physician who can assess you in person and help to determine what type of treatment you are the best candidate for. Voluma is a product that has been FDA approved to restore volume to the mid-face area. Depending on how much product is injected, it can last for up to 2 years. If you decide not to be re-treated after it wears off, your face will return to its original state. Your body metabolizes the product and leaves your skin completely in-tact. It is important to keep in mind that every year, your face likely loses 2-3 cc's of volume, so when Voluma fades you may notice some aging changes that have taken place over that two year period. I use Voluma in my practice on an almost daily basis, as it is a safe and effective product to treat volume loss. If you decide to proceed with Voluma injections sure to find a physician who has experience using the product to ensure that you get the best result possible.

Due to the conservative amount of product you are considering for injection you can expect you will have essentially no change once the product wears away.  This product lasts for up to 2 years and the results will fade slowly over time.

 if he is not getting Fillers done, your face will essentially go back to where it would have been if you never had Fillers done in the 1st place.