Some people because of the mental pressure is relatively large, so choose to bite the nail way to reduce stress, to quickly quit first choose the right way to reduce stress such as exercise, followed by the choice of aversion therapy to change the habit of biting nails. Specific practices can be nails coated with bitter melon water, or chili water, when biting nails will feel the taste is very unpleasant and give up; you can also tie a leather band on your hand, when you bite your nails pull the band, so that you have a very painful feeling, so you can also slowly quit.