My son had one done, also for medical reasons at the beginning of January. The operation was done under general and as pp has said, it looks gross and swollen etc when you first see it, bit of a shock but I just tried to not let him see that I thought it was bad.
It took him about 5 days before he would put any pants or trousers on. I bought loads of loose joggers for him and some bigger pants, but he has only worn one pair of the joggers as once I got pants on him he would then wear normal trousers. The only thing that I found tricky was that with his car seat I had to take the harness bit out and just use the seat as a booster because there was no way he would have had that done up. I would buy some over sized tshirts so he can just wear that for the first few days, when leaving the hospital they let him keep his gown as they couldn't get pants on him! So he went home in just the gown and no pants!!
His scabs still haven't all completely fallen off, but then he refuses to let me wash it properly in the shower so it will take a bit longer.
The first night was horrible, I'm not going to lie to you it was really hard to get him comfy, we had a pillow that we put between his legs so he could sleep on his side and just one of daddy's tshirts and then carefully placed the duvet over him. It was tough for the first few days, but eventually it got a lot easier.
I hope all goes well xxx