Gluten dairy free

 Can I ask why you took dairy and gluten out of your son's diet in the first place? Has he been diagnosed with coeliac disease, or gluten intolerance and dairy intolerance?  Bearing in mind your son's age, it is important only to take out gluten/dairy on the advice of a doctor. 

If your son has coeliac disease,  it is important to understand that you do not reintroduce gluten/wheat into his diet,  as this will cause further damage to his gut.  

If your son has just been diagnosed with IBS and not coeliac disease,  fibre is very important along with drinking plenty of fluid.  

Perhaps you could give us some background information, as to why you took gluten and dairy out of your son's diet in the first place.   It is not advisable not to eliminate anything from his diet, without a doctor's advice, as your son is still growing and developing and correct nutrition is vital at his age. 

If it's intolerance rather than coeliac disease, you need to keep him off dairy and wheat/gluten for at least 6 weeks, then introduce them one at a time. The way to do it properly is say, for example, you want to introduce dairy back into his diet after the 6 week period of not having it, on day 1, you might give him a teaspoon full of yogurt in the morning and another teaspoon in the evening, if that goes well, with no symptoms, repeat the process on day 2, if all seems okay after day 2, wait until day 5 and give him a small pot of yogurt to try, if that goes alright and there's no effects, he can have dairy in moderation after this.  Please note that if he again over-loads his system with dairy, he may reach his tolerance point again and become intolerant once more, so don't let him 'go mad' with it. Once you know he's okay with the dairy, you can do the same with gluten/wheat. By the way, they suggest yogurt or cheese to start the process of re-introducing dairy into the diet because they are lower in enzymes than say butter or milk etc.

One important point I would like to make regarding your son's blood test though, is that generally blood tests are less reliable than an endoscopy with biopsies taken. I know it sounds daunting, but they would be able to see the state of his gut, rather than relying on a blood test. (My own blood test came back as a false negative, but when I had the biopsies, they came back positive). Given the age of your son, they would probably do it under an anaesthetic, rather than doing it while he's awake. Obviously, it's up to you whether you take this step. Coeliac disease is for life, there's no turning back, but it can save a lot of other health issues in the future once diagnosed and the diet adhered to. 

I should add, that for both the blood test and the biopsies, you need to have been eating gluten/wheat for at least 6 weeks on a daily basis, otherwise the test result will be inaccurate. 

Might I suggest you contact Coeliac UK for some free help and advice, Google the website for more information. They actually are a lot more help a than doctors, in fact, they educate them on the disease.

I notice you said you are remodelling your kitchen, from the information I have found in the past, plaster can contain gluten, and if he's breathing that in (regardless of what school meals he's having), the dust from the plaster can find it's way into the stomach after breathing it in, so you might want to consider that too. 

Also, something else else to bear in mind, if it is coeliac disease and it goes untreated, it can lead to malnutrition, other auto-immune diseases, osteoporosis or even cancer, so it's worth getting the correct diagnosis.

Glad I could help though. Let us know how he's getting on; I'm pleased he's feeling better! It's half the battle when you can live with the diet! 

It's great that your son is feeling some improvement, so it looks like he may be struggling with either dairy or gluten (hopefully not both). 

I would agree with what's been said, that you need to have the food out his diet for at least 6 weeks and then a very gradual reintroduction of each food seperately. I also wanted to add that you need to make sure he''s 100% compliant on the diet, or you'll not really find anything out. Dairy and gluten can be hidden in so many things. 

I also wanted to add- having issues with dairy can sometimes be a temporary thing following an illness (eg a stomach bug) or course of antibiotics. Both of these can damage the healthy bacteria in out gut causing our body to have difficulty with dairy. So it could be a case of helping your son's gut get back in working order again. A good quality probiotic can help with this and is really a good thing for anyone with digestive or health issues. 

I hope you get to the bottom of it and he continues to feel well.