Kundalini means that certain healing channels and chakras have been opened and with that you gain access to the Earth's energy. The Root Chakra acts as an entrance for the Kundalini energy. The Kundalini energy known as "the kundalini fire" runs all the way through the body and out of the Crown Chakra. Over a period of time an open Kundalini means a complete cleansing of your Chakras, the body parts, and of the energy channels is obtained.
This shows what happens after each of the attunements in Reiki. Reiki is possibly the simplest healing and self-development system that exist. It is possible to channel the healing energy to yourself and to others, just by intention.
Reiki 1:
The first attunement opens the healing channels to allow channelling of Reiki energy.
At the same time you are prepared for the Kundalini awakening in Reiki 2. The Crown, Heart, and hand chakras are opened and strengthened.
You are taught to perform a complete healing treatment and to heal remotely from a distance. Reiki 1 is equivalent of the USUI Reiki1-2-3
attunements.
Reiki 2:
The Reiki channels are strengthened. The Kundalini awakening where the main energy channel
opens reaches the minimum Solar Plexus chakra, preparing for the full Kundalini rising in Reiki 3. You will learn a specific meditation.
When you perform this meditation, you increase for a short time, the power of the flame in the Kundalini fire/energy. In this way, all the
chakras/energy systems are enlightened and a cleansing takes place.
Reiki 3:
The previous attunements are strengthened and the Throat, Solar Plexus, Hara and Root
Chakras are opened. The Kundalini fire is strengthened and reaches up and out of the Crown Chakra, a full rising of the Kundalini takes place.
After this you are taught to attune crystals and objects so they can act as Reiki channels. You are also ready to continue with the extra
attunements.