I want to get Ultherapy, but I'm scared because I heard it might cause swelling symptoms. ㅜ

I heard that Ultherapy is effective, so I was planning to go ahead and get the procedure this time. However, I heard from some people who have undergone surgery that there is a risk of hollowing out of the cheeks, and since I am also at an age where I don't have much cheek fat, I am a bit scared. They say Ultherapy is a safe procedure, but unless it's done by an experienced doctor, there is a possibility of a "dished" or hollowed-out appearance. Is there any safe, stable, and effective procedure that doesn't have side effects like hollowing out the cheeks?

The skin has lost a lot of elasticity, and the cheek fat around the mouth has sagged downward, so a lifting effect is needed.