Most effective: Large, flat areas just like the arms and legs. Least effective: Curved areas love the underarms, all of which will cause significant trauma to the face and other thin skinned areas. Tip #1. Use the blow dryer properly. Blow drying is an activity that should be done proficiently. https://telegra.ph/Tips-For-Gorgeous-Hair-That-Wont-Cost-A-Penny-08-26