The main symptoms may include: itchy or swollen lips, mouth, tongue and throat a skin reaction, for example hives, a rash or flushed skin wheezing, noisy breathing or shortness of breath diarrhoea, feeling sick, vomiting and feeling bloated (swollen abdomen) coughing a runny or blocked nose sore, red and itchy eyes These symptoms may be caused by problems other than food allergy.