I've been doing some kind of tantric exercises for, I don't know, maybe 10 years or so, on and off.
Never once did I experience anything like "kundalini syndrome". No involuntary twitching, no sleeplessness, no itching, no hallucinations, no headaches, no mood-swings.
Instead, I consistently experience bliss, better confidence, more calmness, and greater sex.
Clearly, I'm doing it wrong.