What happens if you have a mild concussion and you don't treat it?

Mild concussion without treatment may cause headache, limb numbness, retrograde amnesia, etc.

Mild concussion is a mild brain injury after external force impact, which can lead to local capillary rupture, brain cell damage, causing headache. If the injury limb function area, can cause limb numbness, if not treated later can also occur, if external force impact damage central nerve, can lead to brain nerve disorder, transient amnesia, memory development with time can recover, if not treated in time, will appear retrograde amnesia.