Could you tell me what happens if you push yourself too much when you have a concussion?

Brain swelling, pain: Brain swelling and pain can intensify. As there is no structural damage, this is unlikely to cause permanent damage.

Depends: The effects of concussions can vary and be unpredictable. It depends on the severity of the injury. The best thing is to give your brain complete rest. The more strain you place on your brain while it is attempting to heal, the more likely it is to slow down the healing process.