How To Stop Sweating On Back Of Neck. One of the most common complaints women have about their bodies is that they sweat on their back, underarms and forearms. It doesn’t matter if it’s hot out, or you’re wearing a t-shirt � how to check for cockroach eggs A lot of people are interested in learning how to stop sweating � especially around the armpits, which feels like you may be smelling bad sometimes (you probably don�t). I can tell you this! You want to do some light exercise before bedtime so your body gets used to using more oxygen during sleep time. This way, when it really counts at night, you will not sweats so much!