Nasopharyngeal cryotherapy. The ENT doctor strongly recommended it because my child often has a sore…

Nasopharyngeal cryotherapy. The ENT doctor strongly recommended it because my child often has a sore throat and frequent ARVI, and the whole problem is rooted there. I have a question for those who have undergone this procedure for themselves or their children: is it necessary? How is it tolerated? How do you feel afterward? And most importantly, does it really boost local immunity, or is it similar to removing tonsils and adenoids, and could it potentially make things worse? I started having these questions after I got home, when I realized I was clueless and hadn't properly asked the doctor about the procedure, the extent of our adenoids, or anything at all. She just said, 'Come back in 3 weeks, and if the throat is healthy, we'll do the cryo.'