Conditions

How is post concussion syndrome diagnosed

Post-concussion syndrome is diagnosed clinically, when symptoms following a head injury persist beyond the expected recovery period. There is no confirmatory test; imaging is typically normal, which does not mean the symptoms are not real. Assessment covers the injury, the timeline of each symptom, a neurological examination, and often specific evaluation of balance and eye movements.

Quick answer

Post-concussion syndrome is diagnosed clinically, when symptoms following a head injury persist beyond the expected recovery period. There is no confirmatory test; imaging is typically normal, which does not mean the symptoms are not real. Assessment covers the injury, the timeline of each symptom, a neurological examination, and often specific evaluation of balance and eye movements.

The symptom clusters

Persisting symptoms group into four areas that overlap. Physical: headache, dizziness, fatigue, nausea, sensitivity to light and noise. Cognitive: difficulty concentrating, slowed thinking, memory problems, described by most people as brain fog. Emotional: irritability, anxiety, low mood, emotional lability. Sleep: difficulty falling asleep, sleeping excessively, or waking unrefreshed. Sleep disturbance deserves particular attention because it worsens every other cluster, and treating it often improves the whole picture.

Why imaging is normal, and why that matters

CT and MRI look at structure, and concussion is a disturbance of function rather than a visible structural injury. A normal scan is therefore expected and does not cast doubt on the diagnosis. This is worth stating plainly, because people are frequently told their scan is normal and infer that nothing is wrong or that they are not believed. Imaging is arranged when there are red flags rather than routinely, and it is performed externally since these offices have no imaging suite.

Assessment and what maintains symptoms

The history covers the injury itself, the timeline of each symptom, and what has been tried. Examination includes a full neurological assessment and often specific attention to balance and eye movements, since vestibular and oculomotor dysfunction are common and treatable contributors. Several maintaining factors are worth identifying: medication overuse headache from frequent analgesic use, untreated sleep disruption, deconditioning from prolonged rest, and untreated anxiety about the symptoms themselves.

About this practice

Clinical Neurology Specialists has been physician-owned since 1998, when Leo Germin, M.D., FAANEM founded it. Five board-certified neurologists and four advanced practice providers see patients at the Las Vegas and Henderson offices, each with its own AANEM-accredited electrodiagnostic laboratory.

Clinical Neurology Specialists is an adult outpatient neurology practice for patients 18 and older. The practice performs no surgery and operates no imaging suite, infusion suite or interventional pain programme, and provides no emergency or inpatient care.

Emergency & crisis resources: Clinical Neurology Specialists is not an emergency service. For stroke symptoms, a seizure lasting more than five minutes or any medical emergency, call 911 or go to the nearest emergency room. For a mental health crisis, call or text 988 (Suicide & Crisis Lifeline).

Frequently asked

Questions about how is post concussion syndrome diagnosed

How is post-concussion syndrome diagnosed?
Clinically, when symptoms following a head injury persist beyond the expected recovery period. There is no confirmatory test. Assessment covers the injury, the timeline of each symptom, a neurological examination and often specific evaluation of balance and eye movements. There is no confirmatory test, and imaging is typically normal because concussion is a disturbance of function rather than visible structural damage.
My scan was normal. Does that mean nothing is wrong?
No. CT and MRI show structure, and concussion is a disturbance of brain function rather than a visible structural injury, so a normal scan is expected. It does not mean the symptoms are imagined or that no diagnosis applies. This is a very common and understandable misunderstanding.
How long should recovery take?
Most people improve within weeks, but a minority have symptoms that persist considerably longer, and there is no single timeline that fits everyone. Giving a specific figure would be misleading. What matters more is identifying treatable factors that are maintaining the symptoms.
What makes symptoms persist?
Several identifiable and treatable things: medication overuse headache from frequent painkiller use, untreated sleep disruption, vestibular or oculomotor dysfunction, deconditioning from prolonged rest, and anxiety about the symptoms themselves. Each is worth addressing rather than waiting for time alone. Sleep disturbance deserves particular attention, because it worsens every other symptom cluster and treating it often improves the whole picture.
When should I go back to the emergency department?
If you develop repeated vomiting, increasing drowsiness, worsening confusion, one pupil larger than the other, new weakness, or a seizure. Those can indicate a progressing injury and need immediate assessment rather than a scheduled appointment. Those signs can indicate a bleed developing after the initial injury, which is why they warrant immediate assessment rather than a call to the clinic in the morning.

Physician-reviewed. Reviewed by the physicians of Clinical Neurology Specialists — board-certified neurologists, AANEM-accredited electrodiagnostic laboratories, physician-owned since 1998. Reviewed 1 August 2026. This article is general education for adults 18 and older and is not a substitute for a consultation.

Next step

Speak to a board-certified neurologist

Adults 18 and older, at the Las Vegas and Henderson offices. Call 702-804-1212 or request an appointment online.