This isn't when you install the AC one day too late or keep the flannel sheets on one night too long. Dr. Oz explains why we sweat and how much is normal -- and when it's an indication that something is seriously wrong. 

Animation produced by Visible Productions Inc.

Want to know how to look marvelous without splurging so much? Dr. Oz invites three beauty experts to share the smartest ways to save money while looking fabulous starting from your hair and makeup tools to the beauty products you use.