Because your body is thin, the internal fire is relatively strong, stagnant in the body, and it is not easy to radiate to the outside. Your hands and feet are cold and you love to break out in cold sweat.

The phenomenon you are talking about is the phenomenon of qi sensation caused by practicing qigong.

Gas sensation phenomenon: acrobatics is the feeling of heat, swelling, cold, numbness and cold.

The true qi generated when standing the pile touches the internal fire, stimulates the nerves, and the brain receives the body heat information, starts the body balance temperature system, and sweats to cool down. Because internal fire is deposited in the body, it is not easy to radiate to the outside. Driven by the true qi, the internal fire radiates to the trunk and head, but because the energy of the true qi is weak, it can't penetrate to the limbs, so the hands still feel cold. Initially produced the effect of dissipating internal fire.

Standing piles frequently will increase qi, promote qi circulation and blood circulation, and remove blood stasis, thus achieving the purpose of dissipating internal fire.

You don't have to feel depressed in your abdomen. As long as you stand still, you will naturally generate qi, which will automatically enter your abdomen.