Hi Doctor I want to ask about my son. he is 2year and 11 month old yesterday, we played football until he was very thirsty and he asked to go back home. after that he asked for water, he drink some water and i found he immediately turned pale on his face. he showed me inside tomatch got pain and i need to hold him going outside with fresh air, about 3-5 mins after. his face turn back to normal Please advise