R.D.
I would ask the pediatrician, but it could be nothing. She could just be a naturally hot kid (my son's that way, always sweaty!)... My eldest daughter used to get really sweaty, and she was diagnosed with palmoplantar hyperhydrosis (excessive sweating of the hands and feet)... THAT'S why you want to mention it the the doctor, but I still think she's probably just a naturally sweaty kiddo :) Just make sure she stays plenty hydrated during the day, and at 7 months, as long as she's gaining proper weight and eating enough bottles/nursing, she's okay :)