The energy of Kundalini has six distinct phases of temperature that will typically present a in an individual’s experience. These are those that I am aware of, others may know of more:
The first is the heat. Though the energy will seem at times non-physical and of an ephemeral quality, at other times it will be felt as extremely hot, HOT! In all the physical aspects of heat. In the spine in the head, the hands and feet, kidneys, adrenals, reproductive organs, and other selected places upon and in the body will at times, experience a tremendous increase of heat and a heat that is not always communicable to a thermometer yet is at other times. A Kundalini thing.
At times a pulsing will be felt as if a pump has been activated typically at the base of the spine but not always. People are different and the symptoms will range. These are the beginning stages of what it means to understand the multiple aspects of physical reality and how it is intermixed into the other dimensions.
To control the heat a few actions can be employed. Drink lots of water, keep your self hydrated and avoid the actions of substances that will rob you of hydration i.e. coffee, smoking, alcohol, hot spicy foods, diuretics etc. All the time. Especially as you feel a heat spike occurring. I have felt them all over my body and sometimes I just radiate heat constantly, (most of the time now). My friends know that I will always fog up the side of the car I sit on now and adjust the defrost accordingly. They see me in cold weather sweating at times and wonder at my imperviousness to chill. A double edged sword to be sure.
Control this with the consumption of watermelon and or cucumber juice.
Another action is the activation of the lunar channels of the body. Lunar is cooling and the solar is heating in this regard. When the body is being overheated, plug the right nostril and breathe solely through the left nostril, until the body cools. Walk barefoot on the earth and allow the energy to be sucked out of the soles of your feet into the earth.
Another way is the use of the Apana energy. This is can be ICY cold and can be as deleterious as the heat so caution is required. This energy is associated with the nature of expelling, or that of descending. I have activated this accidentally and found it to have tremendous cooling actions. The problem is knowing how to turn it off. Solar energy will go up, Apana will go down. This is considered an aspect of Prana in some of the Yoga journals. Whatever. It cools.
I breathe it from the top of the head to the bottom of the spine. Some folks will do this under a moon feeling the lunar energies flowing into their system. Others like me will just activate it with the breath or intention. It can also be brought up the front of the body. Tongue up or not.
I was playing around, while driving one afternoon about 7 years ago, with pulling energy up the front of the spine, kind of in line with some of Gopi Krishna's work. Not knowing what I was doing and Wham! The icy energy began to expand and climb up the front of my torso. It scared me in its intensity and I swore off experimentation while driving for some time after that experience.
COLD, COLD, COLD, like the veins are being pumped with a fluid that will freeze far below the freezing point of water. I intended it back down, which isn't the same as willing it, and it did indeed subside. This is very strong so be careful! If you try this and it gets stuck in the "on" position breathe through your right nostril with the left one plugged and think/feel the energy back into its normal positioning. Be careful and don't panic. Not to be done while driving. - blessings - chrism
...these are the beginning stages of what it means to understand the multiple aspects of physical reality and how it is interpenetrated into the other dimensions.