Tummo practice is also said to generate the four blisses. Tsongkhapa explains that the first bliss arises when the energy drop in the crown chakra is melted when the vital winds are brought to the crown by tummo. When the energies reach the throat, this is the second bliss ("supreme bliss"), when they reach the heart, the third bliss arises ("special bliss") and when they reach the navel, the fourth "innate bliss" arises. If one can hold the mind at the chakras for extended periods, one will gain the ability to control the movement of the energy drops. Then one can also bring the drop back up the central channel, experiencing the blisses again but starting from the navel chakra. One then continues to practice by moving the drop up and down the central channel, experiencing the four descending and the four rising blisses again and again.