When i'm outside my groin, back, chest, underneath my boobs vagina and behind my knees sweat badly. especially when it's warm out why??

Are you obese?: If you are obese, then the excessive sweating is a common way for your body to cool itself as it is overheated. If you are not obese, but living your life in an A/C environment, then your body is reacting properly to the heat. If you are sweating profusely indoors with normal temperatures, have your MD check you for thyroid problems.