As a preventive measure, it’s important to wash with soap and water in your groin and armpit areas regularly. Prolonged exposure to moisture and friction from clothes can also trigger jock itch.
Winter itch usually does not need treatment other than skin self-care tips you can do at home. Limit shower length, use mild cleansers, and only use the cleanser on the underarm and groin areas.
It can be itchy, though you shouldn't scratch to ... Babies most often experience heat rash in their armpits, neck, groin, ...