Is it normal to hear a crunching sound when Restylane Lyft is being injected into cheek?

It's not typical, but it's unlikely that it will negatively impact your results. Keep in mind that you may have some swelling, which will last 1-2 weeks. If you're unhappy with your final results, you can have it reversed with hyaluronidase and try a different technique next time. Best, Dr. Emer

In my experience, this only happens when the needle gets dull. Could have been a dud needle.  It is not something specific to Restylane Lyft.