5 Unlikely Signs Your Nervous System Is Struck in “Fight-or-Flight” (And How to Unwind It)

We see it all the time at our West Lake Hills clinic: a patient comes in for knee or lower back pain, but during our assessment, we notice they’re also carrying tight jaw muscles, shallow breathing, and persistent tension headaches.

In our 20+ years practicing physical therapy, we’ve learned that the body rarely separates physical pain from nervous system stress. When your craniosacral system—the delicate membrane network housing your brain and spinal cord—is restricted, your entire body gets stuck in a state of chronic sympathetic overload (“fight-or-flight”).

Here are 5 subtle signs that your craniosacral system is strained and keeping your body from truly recovering.

1. Persistent Tension Headaches & Brain Fog

When the membranes lining your skull (cranium) are tight, they restrict natural fluid circulation around your brain. This mechanical pressure often manifests as a dull, constant band of pressure around your head or a heavy sense of mental fatigue by mid-afternoon.

2. TMJ, Jaw Clenching, & Neck Tightness

Your jaw, neck, and upper cranial bones share tight fascial connections. If you find yourself grinding your teeth at night or constantly rubbing your neck after sitting at your desk, the root cause may be tension pulling from deep inside your spinal column.

3. Chronic Lower Back & Sacral Stiffness

The word craniosacral comes from the cranium (head) and the sacrum (tailbone). Because the dura mater membrane connects directly between these two points, tightness at the top of your spine will directly pull on your lower back and hips.

4. Difficulty Relaxing or Getting Restful Sleep

If you feel “wired but tired,” your central nervous system may be physically unable to downshift into a parasympathetic (“rest and digest”) state due to mechanical compression around your spinal cord.

5. Slow Recovery from Workouts or Minor Injuries

Healing requires good circulation and low systemic stress. When your craniosacral fluid rhythm is sluggish, your tissue’s natural ability to clear inflammation and repair itself slows down significantly.

Restoring Balance So You Can Live Pain-Free

Over two decades of clinical experience in Austin, we’ve developed a comprehensive approach to reset these patterns. By pairing gentle Craniosacral Therapy to unwind membrane tension with Clinical Pilates to build active core stability, we don’t just treat your symptoms—we change how your nervous system functions.

Releasing these deep restrictions means you can get back to kayaking on Lady Bird Lake, playing pickleball at the Austin Tennis Center, or taking on the trails at River Place Nature Trail with absolute confidence and ease.

If you recognize these 5 signs in your own body, it’s time to stop pushing through the pain and address the root cause.

👉 Book a Holistic Physical Therapy Evaluation at CORE