What is post-concussion syndrome?

Post-concussion syndrome (PCS) is when concussion symptoms persist beyond the typical recovery window – often considered more than a few weeks after the original head injury. Rather than a single problem, it is usually a combination of overlapping issues: lingering headaches, an irritated balance system, visual and neck dysfunction, and the mood and sleep effects of a slow recovery. The severity of the first concussion does not reliably predict who develops PCS, which is part of why persistent symptoms deserve a thorough, individualized assessment.

Post-concussion syndrome symptoms

By definition the symptoms have outlasted the expected recovery period. They commonly cross several categories and can feed into one another – poor sleep worsening headache, for example.

• Persistent or recurring headaches, often daily
• Ongoing dizziness, unsteadiness, or motion sensitivity
• Difficulty concentrating, mental fatigue, and slowed processing
• Short-term memory and word-finding problems
• Irritability, anxiety, or low mood
• Sleep disturbance and persistent fatigue
• Sensitivity to light, noise, and busy visual environments such as supermarkets or screens

How post-concussion syndrome is diagnosed

PCS is diagnosed clinically when concussion-type symptoms persist past the usual recovery timeframe and are interfering with daily life. The value of the evaluation is in teasing apart the contributors: a clinician examines the vestibular (balance) system, eye movements, and the neck, and reviews cognition, sleep, and mood. Imaging such as MRI is generally normal and is used to exclude other causes rather than to confirm PCS. Pinpointing which systems are driving the symptoms is what allows treatment to be targeted instead of generic.

Post-concussion syndrome treatment

Treatment is non-surgical and is built around the specific systems found to be involved, rather than a one-size approach of rest. Active, targeted rehabilitation is generally favored over continued inactivity, which can prolong symptoms.

• Physical therapy – vestibular rehabilitation for dizziness and balance, plus sub-symptom-threshold aerobic exercise to retrain tolerance
• Pain management – structured treatment of persistent post-traumatic headaches
• Vision therapy and oculomotor exercises for eye-tracking and focusing problems
• Cervical (neck) physical therapy, since neck injury often drives headache and dizziness after the same accident
• Sleep strategies, gradual activity pacing, and a phased return-to-work plan

Recovery & when to see a doctor

Many people with post-concussion syndrome improve with targeted rehabilitation, though the course is variable and some symptoms resolve faster than others. If concussion symptoms are still present several weeks after your accident or work injury, or if they are worsening or keeping you from your usual activities, a focused evaluation is warranted to identify what is driving them. Return to the emergency room for any new red-flag signs – sudden severe headache, repeated vomiting, seizures, new weakness or numbness, slurred speech, or escalating confusion or drowsiness.

Related care at Injury Recovery MD

• car accident injury care
• No-Fault injury care

Long Island offices & service areas

We treat patients across Nassau and Suffolk County from offices including Medford, Islandia, East Islip, Mineola, Bohemia, Smithtown and Stony Brook. Find your nearest office →

Not near one of our offices? We can help arrange transportation to your appointment, or coordinate your care with providers in our Long Island network — call (631) 560-8357 to ask.

Post-concussion syndrome FAQ

How long does post-concussion syndrome last?

It varies widely. Some people improve over a few weeks of targeted rehabilitation, while others have symptoms that persist for months. An individualized assessment helps identify which systems are involved and guides the recovery plan.

Why do I still have symptoms when my brain scans are normal?

Post-concussion syndrome usually reflects how the brain, balance system, eyes, and neck are functioning rather than visible structural damage, so MRI and CT are typically normal. Normal scans do not mean your symptoms are not real or treatable.

Does No-Fault or Workers’ Comp cover post-concussion syndrome care?

If your concussion was from a car accident, ongoing care is generally billed to New York No-Fault; if it was work-related, it is billed to Workers’ Comp, with $0 out of pocket for eligible visits. Coverage depends on your claim and eligibility, and we can help you verify benefits.

Why do supermarkets and screens make me feel worse?

Busy visual environments demand constant eye movement and motion processing, which are the systems most often disrupted after a concussion. The result is dizziness, headache, and mental fatigue in places that never used to bother you. Vestibular and oculomotor rehabilitation is aimed directly at rebuilding that tolerance.

Is it too late to start treatment if my concussion was months ago?

No. Targeted rehabilitation is used well after the original injury, because the point is to treat the systems still driving your symptoms — balance, eye movement, the neck, headache, and sleep — rather than the impact itself. A focused evaluation identifies which of those are involved and what to work on.