Symptoms triggered by food chemical intolerances vary from person to person. The commonest ones are recurrent hives and swellings, headaches, sinus trouble, mouth ulcers, nausea, stomach pains and bowel irritation. Some people feel vaguely unwell, with flu-like aches and pains, or get unusually tired, run-down or moody, often for no apparent reason. Children can become irritable and restless, and behavioural problems can be aggravated in those with nervous system disorders such as ADHD (attention deficit hyperactivity disorder). Even breast-fed babies can have food intolerance reactions due to chemicals from the mother’s diet getting into the breast milk, causing colicky irritable behaviour, loose stools, eczema and nappy (diaper) rashes.