Why Does My Body Lock Up (Tetany) During Breathwork - Is It Dangerous?

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Short Answer

Tetany (muscle cramping/locking) during breathwork is usually caused by rapid changes in blood CO2 and calcium levels. It's uncomfortable but rarely dangerous for healthy people. However, certain medical conditions make it risky—know your contraindications.

What This Means

Tetany feels like your hands curling into claws, your fingers stiffening, or your face muscles locking. It happens because certain breathing patterns (especially rapid, deep breathing) lower CO2 levels in your blood, which affects calcium availability to your muscles.

Why This Happens

Picture this: You're in a breathwork session. Suddenly your hands seize up like paws. Your lips tingle. Maybe your feet cramp. If you didn't expect this, it can feel terrifying—like something is seriously wrong. It's usually not.

What Can Help

• Grounding techniques — Physical presence practices that anchor you in the present moment
• Breath regulation — Slow, intentional breathing to shift nervous system state
• Cognitive reframing — Examining thoughts and challenging catastrophic thinking
• Somatic awareness — Noticing bodily sensations without judgment
• Professional support — Therapy when patterns are persistent or overwhelming

When to Seek Support

The biology: Lower CO2 causes respiratory alkalosis, which reduces ionized calcium in your blood. Muscles need calcium to relax—without enough, they contract and lock up.

If these experiences are interfering with your daily functioning, relationships, or sense of safety, working with a trauma-informed therapist can provide personalized tools and a container for processing that may not be possible alone.

Robert Greene

Author, Founder, Navy Veteran & Trauma Survivor

Robert Greene is a writer and strategist focused on human behavior, relationships, and personal development. Drawing from lived experience, global travel, and diverse perspectives, he explores the patterns driving how people think, connect, and self-sabotage. His work challenges conventional narratives around mental health, modern relationships, and personal growth. Because awareness is where real change begins.