When healing with chi energy, suffering from traumatic injury or weakened by debilitating illness, the life force can leak out and continue to drain unless steps are taken to seal off the leakage. Continued draining of the healing energy can weaken your system, causing you to feel cold, tired, and drained.
The point of leakage is called the energy gate. Seal off this gate, and you prevent further unnecessary draining of your energy. Experienced reiki and qigong healers make it a practice to always close their energy gates at the conclusion of each healing and to close off the gates of severely weakened patients, too.