First things first:

for your son and for you!
I had all four of my wisdom teeth out when I was 22 and while it wasn't
exactly a horror story, it was no picnic either. I have some jaw issues and so was in even worse shape than normal afterwards in terms of getting my mouth open and getting food in there. But, I rebounded pretty quick. He's younger so he'll likely do even better as long as he follows all the doctor's orders. Everyone has a different experience (like childbirth, or so I've been told) so it might be easy-peasy for him.
I wish you both the best.
Now, in terms of advice other posters gave:
One thing to keep in mind if your son doesn't want to eat is that it will be important to have food in his stomach if he is taking pain medications.
SO. VERY. IMPORTANT.
I couldn't eat anything. In fact I could open my mouth just enough to get the pills in, so all that was in my belly was water, despite the doc saying even milk or juice would be a better choice. I was just so uncomfortable that I wanted to take the meds and go to bed.
Bad. Idea.
I ended up throwing up and FORCING my mouth open when I did that. In retrospect, it would've been SO much smarter to just "suck it up" and have a little something with the meds.
You live and learn, LOL!
He'll be hungry but he won't want to eat..
This was also me. He might be begging for that Ensure in the end!
I am getting my 4 wisdom teeth out in 1.5 weeks. They are not impacted just that 2 of them have broken and I was told to get the other 2 out at the same time. I am 38 and I am terrified because I hear the older you are the worse the recovery is. How bad is it going to be at my age and what will the recovery be like?
I was 22 and my mom was in her late 20's I believe and like I wrote above, everyone is different. My mom did fine. Two of my wisdom teeth came out easy, one other was shattered and came out in pieces and the third was impacted around a nerve so there was the possibility I'd have long-term damage. After all that though, I was generally (but not exceptionally)miserable for about 4 days and then perfectly fine. The hardest part for me was how tough the meds were on my belly. Other than that, with lots of naps, the pain was tolerable.
I know some people whom I work with who've been in their mid-30s and older and they'd have it done on Friday and been back to work perfectly fine on Monday. Others have been out for a week. I wouldn't worry too much about it because you're really not going to know until it's actually done. I would just follow some of the very sage advice given here about the food and the meds and plan on getting plenty of rest.
Best of luck to you too!
