The Symptom Overlap Is Nearly Complete Anxiety and concussion share the same autonomic nervous system pathways, which is why they produce identical symptoms. Both conditions shift the autonomic nervous system toward sympathetic dominance. Both involve dysregulated neurotransmitter systems. Both affect cerebral blood flow. The body does not care whether the sympathetic activation comes from brain injury or from psychological threat. The downstream effects on headache, dizziness, cognition, and sensory processing are physiologically identical (Broshek et al., 2015). This is not "it's all in your head." Anxiety-generated symptoms are real physical symptoms with real physiological mechanisms. Your headache hurts. Your dizziness is genuine. Your brain fog impairs your function. The distinction is the cause, not the reality of the experience. The overlap creates a diagnostic challenge that frustrates patients and clinicians. After a head impact, any symptom could be concussion, anxiety about concussion, or both occurring simultaneously. Most post-concussion presentations involve some degree of both, making clean separation impossible through symptoms alone. How Anxiety Produces Each "Concussion" Symptom Headache. Anxiety activates the upper trapezius, suboccipital muscles, temporalis, and masseter (jaw clenching). Sustained contraction of these muscles produces tension-type headache: bilateral pressure or band-like tightness around the head, pain at the base of the skull, and forehead pressure. This is the most common headache type after concussion, and anxiety-driven muscle tension produces an identical pattern. The headache is real. The mechanism is muscular, not neurological. Dizziness. Anxiety produces hyperventilation (rapid, shallow breathing), which reduces blood CO2 levels. Low CO2 causes cerebral vasoconstriction, reducing blood flow to the brain and producing lightheadedness, unsteadiness, and a floating sensation. Anxiety also increases vestibular sensitivity: the same head movements that felt normal before anxiety amplified them now produce a dizzy, disoriented feeling. This vestibular hypersensitivity is identical to post-concussion dizziness (Staab et al., 2017). Brain fog and concentration difficulty. Anxiety consumes cognitive resources. Your working memory and attention are finite resources. When anxiety occupies a significant portion of those resources (monitoring for symptoms, catastrophic thinking, hypervigilance), the remaining capacity for concentration, memory, and decision-making drops. You feel foggy, slow, and unable to think clearly. Cognitive testing during acute anxiety shows measurable performance decreases identical to those seen after concussion. Fatigue. The sympathetic nervous system activation of anxiety is metabolically expensive. Sustained fight-or-flight burns energy at an elevated rate. The crash that follows (parasympathetic rebound) produces profound fatigue. This cycle of hyperarousal followed by exhaustion mimics the energy management problems of concussion. You feel depleted despite resting. Light sensitivity. Sympathetic activation dilates pupils. Dilated pupils admit more light, making normal lighting uncomfortable. Anxiety also increases neural sensitivity to sensory input across all modalities. Light that was comfortable becomes irritating because your nervous system has lowered its threshold for sensory overload. Nausea. The vagus nerve mediates both anxiety-related nausea and concussion-related nausea. Sympathetic activation suppresses digestive function, creating the queasy, "stomach dropping" sensation. Anxiety-driven hyperventilation adds to this by disrupting the pH balance that gut motility depends on. Why the Overlap Matters for Recovery Misattribution extends recovery. If your symptoms are primarily anxiety-driven but you believe they are concussion-driven, you treat them with rest and avoidance. Rest and avoidance are the wrong treatment for anxiety. They reinforce the avoidance behavior and increase anxiety sensitivity. Your symptoms persist not because the concussion is not healing, but because the anxiety maintaining the symptoms is not being addressed. The two conditions feed each other. A real concussion creates real anxiety. The anxiety amplifies concussion symptoms. The amplified symptoms increase anxiety. Separating "how much is concussion" from "how much is anxiety" is less useful than treating both simultaneously. Effective concussion recovery addresses the nervous system dysregulation that both conditions share. Recovery stalls when only one is treated. Concussion protocols address graduated return to activity and symptom management. Anxiety requires cognitive behavioral strategies and nervous system regulation. Patients who receive concussion treatment without anxiety management plateau. Patients who receive anxiety treatment without concussion-appropriate activity modification feel invalidated. Both components need attention. Exercises That Address Both Concussion and Anxiety Symptoms Joint mobility exercises work for both conditions because they target the shared mechanism: autonomic nervous system dysregulation. Slow, controlled movement shifts the nervous system from sympathetic toward parasympathetic regardless of the original cause. JME 1 Slow cervical rotation addresses the cervical muscle tension that produces headache in both anxiety and concussion. 3-4 seconds per direction. The predictable, controlled nature of this movement signals safety to the nervous system, reducing sympathetic activation from either cause. JME 14 Chin tucks provide grounding proprioceptive input. When anxiety or concussion creates a sense of disconnection or derealization, this exercise anchors you to your body through controlled muscle activation. The focused attention required displaces the symptom-monitoring pattern of anxiety. JME 3 Lateral cervical flexion releases the upper trapezius, one of the primary muscles involved in anxiety-driven tension headache. If your headache worsens with stress and improves with neck stretching, anxiety-driven muscle tension is a significant contributor regardless of whether you also have a concussion. JME 153 Thoracic extension opens the chest for deeper breathing. Both anxiety and concussion restrict breathing through different mechanisms (anxiety through muscle guarding, concussion through postural change). The result is the same: shallow breathing that maintains sympathetic dominance. Opening the thorax addresses both causes. Start your 14-day free trial for routines that address both anxiety and concussion symptoms. Building Nervous System Resilience JME 150 Thoracic rotation introduces controlled vestibular challenge. If dizziness is your primary concern, performing this exercise without symptom increase provides evidence that your vestibular system is functioning. This evidence-through-movement approach is more effective for anxiety reduction than reassurance from others. JME 42 Shoulder mobility releases the protective shoulder elevation present in both anxiety and post-concussion guarding. Dropping the shoulders while breathing slowly activates the parasympathetic system. This is a rapid intervention you use throughout the day whenever you notice tension building. JME 5 Cervical extension mobilizes the suboccipital region. Suboccipital tension produces the "pressure in the head" sensation that both anxiety and concussion patients report. Reducing this tension reduces the sensation, which breaks the anxiety loop that interprets the pressure as evidence of brain damage. JME 7 Cervical protraction and retraction develops controlled head movement. If you have been guarding your head and neck (common in both post-concussion and concussion-anxious individuals), this exercise rebuilds confidence in head movement. Moving your head without symptom increase is therapeutic for both conditions. Calm your nervous system with simplmobility's daily 2-3 minute routines. The Extended Exhale: Your Primary Tool Inhale 4 seconds. Exhale 6-8 seconds. Repeat 5-10 cycles. This breathing pattern directly activates the vagal brake on heart rate, shifting autonomic balance toward parasympathetic dominance. It works for anxiety-generated symptoms and concussion-generated symptoms equally because both conditions involve the same autonomic pathway. Use extended exhale breathing: When you notice symptom monitoring beginning Before and after cervical mobility exercises During symptom flare-ups from either cause Before meals if nausea is an issue Before sleep to facilitate the sympathetic-to-parasympathetic transition The breathing works regardless of the symptom cause. You do not need to determine whether your headache is from anxiety or concussion before using extended exhale breathing. Both respond to parasympathetic activation. Treat the nervous system, not the label. If I have anxiety symptoms after hitting my head, does that mean I do not have a concussion? No. Anxiety symptoms and concussion symptoms coexist in most cases. Having anxiety does not rule out concussion, and having concussion does not rule out anxiety. If you hit your head with meaningful force, get evaluated regardless of whether you think anxiety is contributing. A clinician can assess for concussion signs that anxiety cannot produce: abnormal eye tracking, balance deficits on objective testing, and cognitive performance below baseline. Why do my symptoms get worse when I think about them? Attention amplifies sensation. This is a well-established neurological phenomenon called somatic amplification. When you focus on your head, your brain increases the gain on sensory input from that region. Subtle sensations that you normally filter out (mild pressure, warmth, pulsation) get amplified into noticeable symptoms. This happens with both anxiety and concussion. The solution is redirecting attention to external tasks or controlled movement, not forcing yourself to ignore the symptoms. Should I tell my doctor I think anxiety is contributing to my symptoms? Yes. This is not admitting the symptoms are fake. This is providing complete clinical information that helps your provider develop the right treatment plan. A provider who understands the anxiety-concussion overlap will address both components. If your provider dismisses your symptoms as "just anxiety," seek a second opinion from a concussion specialist who understands that both conditions require treatment. References Broshek, D. K., et al. (2015). A review of post-concussion syndrome and psychological factors associated with concussion. Brain Injury, 29(2), 228-237. PubMed Staab, J. P., et al. (2017). Diagnostic criteria for persistent postural-perceptual dizziness (PPPD). Journal of Vestibular Research, 27(4), 191-208. PubMed