Classical literature define the signs of an awakened kundalini as mental, vocal and physical signs.
1. Mental signs.
These include visions that range from ecstatically blissful to terrifyingly frightful.
2. Vocal signs
These include spontaneous vocal expressions ranging from singing or reciting mantras to make various animals sounds such as growling or chirping.
3. Physical signs
These include trembling, shaking and spontaneously performing certain postures.
Other experiences associated with kundalini include waves of bliss, periods of elation, glimpses of transcendental consciousness. There are also less pleasant experiences associated with a kundalini awakening including trembling, sharp aches in areas associated with the chakras, periods of irrational anxiety, sudden flashes of heat.