What is a rash under the breasts called? slightly itchy.

Intertrigo: Intertrigo (in-tur-tri go): this is one of the more common rashes and occurs when two warm, moist surfaces rub against each other. The chafing traps moisture and results in red, itchy sore skin due to tiny breaks in the skin's surface. This allows for bacterial and fungal growth, such as candida (yeast). Typically, intertrigo is reddish-brown and may ooze and crust over.