In short the answer is no. As long as you use the hot air brush according to the instructions, apply a good heat protection spray and never try and style it on wet hair (unless it is designed to do so) then there should be no damage. It is recommended to buy a hot air brush that has been well reviewed on Amazon.com. Look for new technology such as ionic which means it produces silky, smooth hair while locking in moisture so it won’t dehydrate the hair. The hot air brushes of today are also notoriously faster than using a hairdryer and brush so minimizing the time spent drying out hair. As long as you don’t apply unnecessary heat to your hair you should get great volume and curls. Choose an airbrush that is suitable for your hair type and the curls you want. The best hot air brushes to buy are The Infinity Pro Hot Air Styler 1.5” by Conair, Revlon 5265CU Shape and Smooth Air Styler or for a smaller budget try the John Frieda Salon Shape 1.5” Hot Air Brush. All have excellent customer ratings on Amazon.com.