I have an adult son with IBS, waiting on blood tests coming back. Over the past week nothing seems to help, probiotics, oil of peppermint capsules, audmonal and buscopan. He was told to try a gluten free diet and avoid dairy products. Since then he has had a headache since last week, he's been taking paracetamol with little effect but I don't want him to have the paracetamol giving him the headaches as can happen. I wondered if it was a detox going from food with gluten to gluten free and also he has been taking lactofree products e.g. milk, yoghurts etc. Any advice would be so helpful.