I'm so sorry you are both struggling so much. There truly can't be anything tougher on a parent than seeing their kids suffer.
I can't believe how thoughtless some teachers can be... I ran into one similar but, as my son was older, he was able to stand his ground a bit better. One suggestion about the bathroom, is that he run the water while he's going to the bathroom. It will help drown out any noise and, if anyone by chance asks about the water, he can easily say that he had to scrub some ink off his hands or something. I've even read on here about some products that can be used to cover up smell... I think Devynn's mom was looking into something....
I encourage you to look into enteral nutrition (EN) for added nutrition (and subsequent growth). There are lots of kids here who are supplementing their diets with these nutritional shakes and they've seen considerable improvement in weight and height. There's no harm from these shakes and they can really be beneficial. Peptamen or peptamen Jr. are commonly used because they are formulated to be more easily absorbed but, if your son finds them unpalatable, Boost and Ensure will do the job as well. My son did exclusive EN (so no food, formula only for six weeks) to induce remission and then stayed on them as a supplement/maintenance treatment for two years (1/2 dose with regular diet added back). When used exclusively, they have comparable success rates at inducing remission as do steroids (with none of the side effects) but, unfortunately, are not as successful at maintaining remission (my son has since started remicade). But, even on remicade and at 19 years old, he still has 1-2 shakes every day. I very much believe the nutrition he's taken in has helped him stay healthy so far. To give you an idea on weight gain, my son was 140-145 before getting sick and was at 120-125 at diagnosis. With three months of starting EN (six weeks exclusive, six weeks supplemental), he gained 30 lbs - of healthy weight (muscular, etc.). In the last two years, he's gained another 15-20 lbs. (He was already tall when diagnosed, so has only grown approx 1-2 inches - to be expected at his age/height.)
Here's a link to some info on EN -
http://www.crohnsforum.com/showthread.php?t=36345
There are a number of parents with boys approximately your son's age, hopefully, some can help you with how to help him adjust to his diagnosis. I know when my son was diagnosed (almost 17), I was constantly asking him how he was, if everything was okay, everytime he went to the bathroom, I'd be there asking how it looked, etc., etc. At a certain point, I could see I was becoming a pest to him... I finally made him a deal that I would stop asking if he promised to tell me if there was anything I should know. This has worked for us. However, having said that, I do still periodically (okay, maybe, often! :ybatty
ask him! But, I also regularly speak of crohns but always very matter-of-factly, almost in passing... ie remind him to drink his shakes because nutrition is important, mention that we need to schedule his flu vaccine in accordance with his remicade, hygiene reminders due to suppressed immune system, etc. - I hope that I've conveyed to him that, while it will always be a factor in his life, it can be a 'matter of fact', 'life goes on' situation and that I will take any comments from him in the same manner (ie I won't get too emotional on him). I hope that makes sense (I certainly don't mean to belittle the impact that pain or certain symptoms can invoke!). But, it definitely is a tightrope when dealing with teens at the best of times, let alone when they must deal with something like crohns!
Have you heard of Camp Oasis (someone correct me if that's the wrong name) - it's a camp run for kids with IBD. A number of kids here have attended and I've only heard good things! It may help him to meet other kids who have similar struggles. I'm sure some of the parents will chime in about Camp Oasis.
I hope some of this helps! :ghug: And that you get some answers from the scope!!