It has been popular for centuries because of its flavour and its medicinal properties. It does make a difference to the flavour of dishes if it is not included but if it is causing problems, then really there is no choice but to leave it out. Apart from contact dermatitis, which presumably is not your problem if Mr Dumpling does the cooking, migraine is the commonest adverse reaction, although there can be other effects. Really the only way to tell is to have a skin test, but you could try not eating garlic for a while and see if whatever symptoms you were experiencing have disappeared.