How is the recovery after under-eye hollowness treatment?

I am a woman in my 20s concerned about hollowness under my eyes. I am considering a procedure and am curious about the recovery process. In particular, I would like to know how long swelling or pain lasts, and how long it takes to return to daily life. I would be very grateful if you could share various opinions from those around you who have experienced this, or recommend any clinics. I look forward to hearing your honest stories!