Let's first find out the difference between high-speed hair dryer and traditional hair dryer? Why is the price of high-speed hair dryer more expensive and more popular with girls? Their core difference lies in the motor. The traditional motor has a speed of 10000-20000 rpm, while the digital motor of the high-speed hair dryer can reach a speed of more than 100000 rpm.

When you fall asleep, you can first gently knead the pain with medicinal wine or safflower oil, and then blow hot air along the shoulder and neck with a hair dryer until the skin is slightly hot. While blowing, you can gently knead it with your index finger and thumb. At this time, the swelling and pain will be reduced a lot.