@Katrin thank you for all the info!!
My daughter had her adenoids removed at a year and half and then tonsils out at 3. Best thing we ever did, she had sleep apnea and would stop breathing for a second and then take a big gasping breath. She snored, mouth breathed during the day, always sick, etc. On to the surgery. She woke up and was chatting and ate like 5 Popsicles. No crying seemed 100% normal. We kept her on their recommend pain medications and honestly say 1-5 was absolutely no difference in her. However just s heads up day 6-9 was rough, she fought the meds, didn't want to eat which in turn made her feel poorly. She has never enjoyed soft foods and won't eat pudding, applesauce, etc. So I think that is why she had a hard time, but her doctors did warn that during the healing process when it scabs and falls off they really struggle. Once healed her school said they noticed an increase in energy level and dropped naps at home and shortened at school. Her sleep is soo much better now and when she gets sick she recovers quicker.
@LaRinda my youngest had his adenoids out at 1 year and that went super well but I’m worried my 3 year old is going to be scared because he’s old enough to be more aware. Did you experience that at all?
I’m a dental hygienist and have seen lots of kids get their tonsils removed. They handle it very well compared to adults! And it benefits them so much! All the symptoms he’s having are very concerning, it can lead to many issues in a long run such as behavioural issues, adhd like symptoms, will affect jaw development which will affect how how he breathes and sleeps more in the future; mouth breathing doesn’t resolve on its own. I would ask your ENT if they think a myofunctional therapist would help him with his mouth breathing issue.