The Football Concussion Protocol: How It Works

Football's concussion protocol has changed more in the last five years than in the previous thirty. The current rules in the English top flight involve an off-field assessment, temporary and permanent concussion substitutes, and a mandatory period of rest before a player can even start a graduated return. The purpose is simple: to remove the decision from the touchline and from the scoreline.

This guide explains how the protocol works in practice for professional competitions, using the English Premier League and IFAB framework as the reference point. The details differ between competitions, but the clinical logic is shared.

What happens the moment a head injury is suspected

The team doctor can stop the game. If a player shows visible signs of concussion, is unsteady, has been knocked out or appears confused, that player is removed and does not return, regardless of what the assessment subsequently shows. This is the highest level of the protocol and it does not allow a return.

Where a player has no obvious signs but the mechanism was significant, the assessment happens away from the pitch rather than at the touchline. The purpose of moving off the field is to give the medical staff privacy, time and the ability to run a proper examination without a crowd and a clock in the way.

The substitute rules that support the protocol

Permanent concussion substitutes were introduced to remove the competitive penalty for taking a player off. A team that uses one does not lose an outfield substitution opportunity, which had previously been a real disincentive to do the right thing.

Temporary concussion substitutes go further: a player leaves for assessment and the team can replace him for the duration of the assessment, with the player able to return only if the assessment clears him. Competitions have trialled these rules at different times, and the direction of travel across the game is toward a longer, more protected assessment window.

Why the 24-hour rule matters more than the first ten minutes

Concussion is a dynamic condition, and a player can pass an immediate assessment and still develop symptoms hours later. Delayed onset is well documented, which is why the protocol includes a monitoring period and why the decision to clear a player is provisional rather than final.

In practice this means the player is observed overnight, asked about headache, nausea, balance, sensitivity to light and any feeling of fogginess, and reassessed the following day before anything else happens. A player who develops symptoms after a match does not simply wait for them to pass; he enters the graduated return pathway.

What the protocol deliberately does not do

• It does not allow a player to decide whether he continues. The decision belongs to the medical staff.
• It does not treat a scan as the test. Imaging is normal in the overwhelming majority of concussions and does not rule one out.
• It does not shorten for a big fixture. Competition context is explicitly irrelevant to the clinical decision.
• It does not skip the graduated steps, even when a player feels completely well.

What changes for the club after the match

A confirmed concussion triggers a defined sequence: a period of relative rest in the first day or two, then the graduated return described in concussion return to play. Training is modified rather than cancelled, and the player stays involved with the squad in ways that do not expose him to contact or to high-intensity heading.

The medical department also reviews the mechanism. A head injury from a challenge, from a fall or from a ball to the head points at different prevention conversations. Heading exposure across a training week is one of the areas clubs now monitor, as described in heading and subconcussive impact.

The role of the independent doctor

Several competitions now use an independent medical professional, separate from both clubs, to review head injury incidents in real time from video and to advise on removal. The purpose is to remove any possibility that club allegiance influences a decision that has to be made in seconds.

Where the system exists, the independent reviewer can recommend that a player be removed even when the club's own medical staff has not called for an assessment. It is one of the clearest examples of how the protocol has been designed around the assumption that the touchline is the worst place to make this judgement.

The direction of travel

Three trends are visible across professional competitions. Assessment windows are getting longer. Substitute rules are being written to remove the competitive cost of caution. And heading exposure in training is being managed as a load rather than accepted as an unavoidable part of the game.

None of those changes remove the difficulty of the decision. They change who carries it and give the medical staff the tools to make it properly.

Information only. This guide is for general information about injuries in professional football and does not replace assessment, diagnosis or treatment by a qualified clinician.