Psychological level
Mental health problems can be accompanied by physical symptoms. Our body and mind are inseparable. Depression causes headaches, fatigue, and digestive problems, and anxiety can cause, for example, an upset stomach.
Practice on nails strengthens willpower and allows you to learn to manage emotions and control perception. Makes you more resistant to physical discomfort. Eliminates anxiety, insomnia, and difficulties with concentration, and develops awareness. Your body will remember that pain and stress can be overcome, and this understanding you can use as a valuable resource in everyday life.
The point is not to endure pain or to compete over who will stand longer in time. The point is to transform the sensations into deep relaxation by working with the breath, even for a short time to begin with. The pain will begin to disappear completely after 5-10 minutes of long exhalations, pronunciation of the meditative sound "Om" and relaxation of the whole body.