Hello dear Warm welcome to Healthcaremagic.com I have evaluated your query for your son in details . * This is in relation with recurrent gastrointestinal infection , not related to teeth . * This is most common from bacterial or viral infection which may be acquired by contaminated food , liquids consumed with uncleaned hands or keeping toys with surface agents into mouth without your notice . * Treatment should be primary with anti emetic , anti biotic , zinc suspension with his pediatrician secondarily to find out the root cause and target it . Hope this will help to clear your doubt . Wishing you fine recovery . Always welcome for any further assistance anytime . Regards .