At any given time, one out of every three people in the United States suffers from a skin disease. In the Academy's Dermatology A to Z section, you will find the following:

• In-depth information about conditions that affect our skin, hair, and nails. 
• Unbiased content that is reviewed by Academy member dermatologists for accuracy. 
• Tips that dermatologists give their patients.  

First sign of pre-diabetes may appear on skin

A patch of darker, thicker, velvety-feeling skin can be a sign of pre-diabetes. If you notice this change to your skin, you should see your doctor. With help, you may be able to prevent pre-diabetes from progressing to diabetes.

• Learn more about acanthosis nigricans.