Hi. My son is 18 months old. He was sick from Saturday, having temperature between 38 and 39. We gave him ibuprofen few times and yesterday he stop having high temperatures. He took last ibuprofen before going to sleep day before yesterday. While he had high temperatures he was behaving normally, eating, drinking, playing, laughing... Today he is having temperatures between 35.1 and 35.8. He is sweating, cranky and sleeps more than usual. What can be causing this low temperature? What would you recommend us to do about it? Best regards and thanks in advance for any comment.