I have diarrhea, vomiting and headaches after a meal. Could this be an intolerance?

Good morning, sir. It is possible that you have an intolerance. I recommend keeping a food and drink diary to identify which foods are most likely to cause your symptoms. If necessary, you can ask your pharmacist or a nutritionist for help. If your symptoms do not improve after removing the foods you have identified, I suggest consulting a doctor. Additionally, make sure to stay hydrated by drinking plenty of water, unless you have been told to limit it. We look forward to seeing you.