The Short Answer Educational content only. Any suspected concussion warrants medical evaluation. Persistent sensory symptoms after concussion warrant assessment by the appropriate specialist, an audiologist or ENT for hearing and sound symptoms, a neuro-optometrist or ophthalmologist for visual and eye symptoms, and a physician or neurologist to coordinate care. Consult a concussion-experienced clinician for individualized care. Temperature sensitivity develops after concussion when the injury disrupts the brain's autonomic control of body temperature and its processing of hot and cold signals, so the person feels too hot or too cold, tolerates temperature extremes poorly, and flares symptoms with heat (Silverberg et al., 2020). Body temperature is regulated by the hypothalamus through the autonomic nervous system, which adjusts sweating, blood flow, and other responses to keep the body stable. Concussion disrupts this control and the autonomic system broadly, so thermoregulation becomes less reliable and temperature discomfort is amplified. Heat in particular tends to worsen post-concussion symptoms. Managing the environment, pacing heat exposure, and autonomic regulation help while the system recovers. The hypothalamus and autonomic system regulate body temperature. Concussion disrupts this control, so thermoregulation becomes unreliable. Heat tends to worsen symptoms, so managing temperature helps. What Temperature Sensitivity Is Temperature sensitivity after concussion takes several forms. People feel too hot or too cold in conditions that do not bother others, struggle to tolerate hot or cold environments, feel their symptoms flare in the heat, and notice their body no longer regulates temperature reliably, running hot, running cold, or swinging between the two. Some sweat too much or too little, feel chilled easily, or overheat quickly with exertion or in warm rooms. Heat intolerance is especially common, with hot weather, hot showers, exercise, and warm environments worsening headache, fatigue, fog, and dizziness. How Concussion Disrupts Temperature Control Body temperature is controlled by the hypothalamus, the brain's master regulator, which senses temperature and drives the autonomic responses that keep the body stable, sweating and dilating blood vessels to cool down, constricting vessels and shivering to warm up. Concussion can disrupt the hypothalamus and, more broadly, the autonomic nervous system that carries out its commands. When this control is impaired, the body regulates temperature less precisely, so the person feels uncomfortable across a narrower range of conditions and responds poorly to heat and cold. Autonomic dysregulation is a common feature of concussion, and temperature control is one of the many autonomic functions it affects, alongside heart rate, blood pressure, and blood flow regulation. The same dysregulation that causes exercise intolerance and dizziness contributes to poor thermoregulation. Why Heat Worsens Post-Concussion Symptoms Heat is a particularly common trigger for symptom flare after concussion. When the body heats up, it demands more from the cardiovascular and autonomic systems to cool down, and in a recovering brain with autonomic dysregulation and a narrow physiological margin, this added demand pushes the system past its limit. Heat also raises core temperature and can affect cerebral blood flow, stressing a brain that is already working with reduced reserve. The result is that heat exposure, whether from weather, exercise, hot showers, or warm rooms, flares headache, fatigue, brain fog, and dizziness. This heat sensitivity is why cooling strategies and pacing heat exposure are useful during recovery. Symptom Presentation Feeling too hot or too cold in ordinary conditions Poor tolerance of hot and cold environments Symptom flare, headache, fatigue, fog, and dizziness, with heat Overheating quickly with exertion or in warm rooms Feeling chilled easily or swinging between hot and cold Altered sweating, too much or too little Overlap with exercise intolerance and other autonomic symptoms Assessment A physician assesses temperature sensitivity as part of the broader autonomic picture after concussion, characterizing the pattern of heat and cold intolerance, thermoregulatory changes, and symptom flare with temperature. The assessment places it alongside other autonomic symptoms such as exercise intolerance, dizziness, and heart rate changes, since they share the underlying dysregulation, and excludes other medical causes of temperature intolerance. Recognizing temperature sensitivity as an autonomic problem guides treatment toward autonomic regulation and environmental management. Treatment Approach Managing the temperature environment brings relief while thermoregulation recovers. Keeping ambient temperature comfortable and stable, dressing in adjustable layers, using cooling strategies in the heat, and avoiding sudden temperature extremes reduce the strain on an impaired system. Because heat flares symptoms, pacing heat exposure, cooling before and during exertion, avoiding hot showers and saunas when they provoke symptoms, and exercising in cool conditions, protects recovery. Autonomic regulation addresses the underlying dysregulation. Diaphragmatic breathing and graded activity support autonomic function broadly, and structured sub-symptom-threshold aerobic exercise, introduced under guidance and in cool conditions, improves autonomic regulation over time, including temperature control. Staying well hydrated supports both thermoregulation and cerebral blood flow. Treating coexisting headache and protecting sleep raise overall tolerance. As the brain and autonomic system recover, temperature sensitivity generally improves. Sensory symptoms after concussion improve faster when the nervous system is regulated and the neck and autonomic system are addressed alongside specialist care. Start your 3-day free trial to build a supportive daily routine. Supporting Mobility Routine JME 155 Diaphragmatic breathing lowers the sympathetic drive that amplifies sensory sensitivity and steadies the nervous system. Ten slow breaths, several times daily. JME 14 Chin tucks reduce upper cervical tension that feeds headache, dizziness, and sensory overload. Ten repetitions with 5-second holds. JME 1 Cervical rotation restores segmental mobility and supports blood flow through the vertebral arteries to the brain. Ten repetitions per direction. JME 15 Cervical lateral flexion addresses side-bending restriction that sustains neck tension and sensory strain. Ten repetitions per side. JME 16 Cervical flexion and extension restore sagittal mobility restricted by suboccipital guarding. Eight slow repetitions. JME 2 Cervical retraction reinforces a neutral head position that reduces the postural strain feeding sensory symptoms. Ten repetitions per set. JME 150 Thoracic rotation restores mid-back motion needed for full diaphragmatic breathing and relaxed upright posture. Eight repetitions per direction. JME 227 Overhead reach opens the thoracic spine and rib cage, supporting the deep breathing that calms an overloaded nervous system. Ten repetitions with controlled tempo. Start your 3-day free trial for joint-specific mobility programming that supports the nervous system regulation behind sensory recovery after concussion. Common Mistakes Treating temperature intolerance in isolation from the broader autonomic picture Pushing through heat exposure that reliably flares symptoms Exercising in hot conditions early in recovery Neglecting hydration, which supports thermoregulation and blood flow Overlooking autonomic regulation as a route to lasting improvement Progression Assessment characterizes the temperature sensitivity and places it in the autonomic picture. Treatment manages the temperature environment, paces heat exposure, and supports autonomic regulation with breathing, hydration, and graded exercise in cool conditions. Treating coexisting headache and sleep raises tolerance. Temperature sensitivity generally improves as the brain and autonomic system recover over weeks to months. Why do I feel too hot or too cold after a concussion? Body temperature is regulated by the hypothalamus through the autonomic nervous system, and concussion can disrupt both. When this control is impaired, the body regulates temperature less precisely, so you feel uncomfortable across a narrower range of conditions and tolerate heat and cold poorly. It is part of the broader autonomic dysregulation of concussion. Why does heat make my concussion symptoms worse? Heating up demands more from the cardiovascular and autonomic systems to cool down, and in a recovering brain with autonomic dysregulation and reduced reserve, this added demand pushes the system past its limit. Heat also raises core temperature and can affect cerebral blood flow, so it flares headache, fatigue, fog, and dizziness. Is temperature sensitivity after a concussion an autonomic problem? Yes. Temperature control is one of many functions run by the autonomic nervous system, which concussion commonly disrupts. Temperature sensitivity travels with other autonomic symptoms such as exercise intolerance, dizziness, and heart rate changes, because they share the underlying dysregulation. This is why autonomic regulation helps. How can I manage heat intolerance during recovery? Keep your environment cool and stable, dress in adjustable layers, use cooling strategies, and avoid sudden temperature extremes. Pace heat exposure by cooling before and during exertion, exercising in cool conditions, and avoiding hot showers and saunas that provoke symptoms. Staying hydrated supports thermoregulation and cerebral blood flow. Will temperature sensitivity go away after a concussion? Generally it improves as the brain and autonomic system recover, especially with autonomic regulation through breathing, hydration, and graded sub-symptom-threshold exercise in cool conditions. Managing the temperature environment and treating coexisting headache and sleep raise tolerance in the meantime. Persistent temperature sensitivity warrants medical assessment. Why Sensory Symptoms Happen After Concussion Sensory symptoms after concussion arise from disrupted sensory processing rather than damage to the sense organs alone. Concussion strains the connections between brain regions, alters the balance of excitation and inhibition, and leaves the nervous system in a sensitized, hyperexcitable state (Silverberg et al., 2020). In this state the brain turns up the gain on incoming signals, so ordinary light, sound, smell, taste, and touch are amplified, distorted, or perceived as threatening. Some symptoms also reflect direct injury to sensory nerves. Most sensory symptoms improve over weeks to months as the brain recovers and the gain settles, and structured management speeds the process. Graded Exposure and Avoiding Overprotection A common trap in sensory recovery is total avoidance. Completely shielding from light, sound, touch, or activity feels protective, but sustained avoidance makes the nervous system more sensitive over time, narrowing tolerance further. The better approach is graded exposure: staying within a tolerable range while gradually and deliberately increasing exposure as tolerance grows, never pushing far past the point where symptoms flare. This retrains the nervous system to accept normal sensory input. Extreme protection, such as constant dark glasses indoors or avoiding all textured clothing, tends to worsen sensitivity and is used sparingly and strategically rather than continuously. Managing Sensory Overload Reduce competing sensory input by handling one channel at a time Take planned breaks in a calm, low-stimulation environment before overload builds Use diaphragmatic breathing to lower the arousal that amplifies sensitivity Pace demanding sensory environments rather than avoiding them entirely Protect sleep, since fatigue lowers sensory tolerance Treat coexisting headache, since pain and sensory sensitivity feed each other When to Seek Specialist Assessment Persistent or worsening sensory symptoms, symptoms that interfere with work or daily life, and any symptom with concerning features warrant specialist assessment. Visual and pattern symptoms are evaluated by a neuro-optometrist or ophthalmologist. Hearing and sound symptoms are evaluated by an audiologist or ENT. Smell symptoms are evaluated by an ENT. Touch, temperature, and pain sensitivity are evaluated by a physician or neurologist, who can also coordinate care and exclude other causes. New neurological symptoms, sudden sensory loss, and rapidly worsening symptoms need prompt evaluation rather than watchful waiting. The Autonomic and Cervical Contribution Sensory symptoms rarely stand alone after concussion. Autonomic dysregulation keeps the nervous system in a heightened, sympathetic-dominant state that amplifies sensitivity, and cervical dysfunction feeds headache, dizziness, and sensory strain through shared brainstem pathways. Regulating the autonomic nervous system with diaphragmatic breathing and graded activity, and addressing the neck with mobility and manual therapy, lower the background arousal on which sensory symptoms ride. This is why calming the nervous system as a whole often eases sensory symptoms that specialist treatment alone does not fully resolve. References Patricios, J. S., et al. (2023). Consensus statement on concussion in sport: the 6th International Conference on Concussion in Sport, Amsterdam, October 2022. British Journal of Sports Medicine, 57(11), 695-711. PubMed Silverberg, N. D., et al. (2020). Management of concussion and mild traumatic brain injury: a synthesis of practice guidelines. Archives of Physical Medicine and Rehabilitation, 101(2), 382-393. PubMed