Concussion Symptom Scale

Symptom Severity Scale
A guide to understanding symptom levels and their corresponding action plans.
ScaleWhat It Feels Like (Symptom Description)What To Do (Action Plan)
1

Baseline/Very Mild

A slight, fleeting "off" feeling or a mild symptom (e.g., slight pressure) is present but easily ignored. No impact on thoughts or actions.

PROCEED: Safe to continue all planned activities. Considered a safe baseline. Continue activities while monitoring.

2

Mild/Noticeable

Symptoms are clear but manageable (e.g., dull headache, slight fog). You can still function without much difficulty.

PROCEED WITH CAUTION: Continue, but be mindful that you're near your limit.

3

Moderate/Distracting

Symptoms begin to interfere with concentration. A constant headache or fog makes complex tasks harder.

PAUSE: This is your first warning sign. Stop your activity and take a short rest break until symptoms return to a 3/10 or lower.

4

Significant/Interfering

Symptoms are intrusive and make tasks challenging. You may need to re-read things or feel an urge to leave stimulating places. Functioning effectively is difficult. A throbbing headache or dizziness makes focusing on screens or work very difficult.

PAUSE & STOP ACTIVITY: Stop your current activity and take a structured break (15-20 mins) in a quiet space. Do not resume until you are back in the Green Zone (Level 3 or lower). If a long rest doesn't bring symptoms down significantly, consider ending the specific activity (e.g., work) for the day.

5

Severe/Overwhelming

You feel very unwell. A severe headache, nausea, or dizziness makes cognitive tasks nearly impossible. Strong need for a dark, quiet room. Symptoms are so severe you can't do much of anything. Pain or dizziness is intense, and you're focused only on coping with how you feel.

STOP & RECOVER/COMPLETE REST: Stop all productive activity for the day. Focus only on complete rest and symptom management. All energy should be focused on resting.

6

Critical/Extremely Severe

You're in significant distress. The pain, dizziness, or nausea is profound and all-consuming. The most severe symptoms possible, such as an excruciating headache or extreme disorientation.

REST & CONTACT/EMERGENCY: Rest immediately and contact your doctor/physio to report the severity of your symptoms. This warrants immediate medical attention.