What is the 123 rule for concussions?

The 123 rule for concussions is a simple guideline used to assess symptoms and the severity of a concussion. It suggests that if an individual experiences one symptom, they should monitor their condition; if they have two symptoms, they should seek medical advice; and if three or more symptoms are present, they should seek immediate medical attention. This rule emphasizes the importance of recognizing and responding to concussion symptoms promptly to ensure proper care and recovery.