Replying to Ignoring a concussion

There's probably threads on this topic already but I can't find them

How many of you have had lasting complications due to concussions? Did you not rest properly after the initial injury? Or did complications arise as you had more concussions ?

Did you find ways to overcome the lasting symptoms or is now a constant battle trying to manage the effects?

these are just general questions but I'm more so interested to hear stories/experiences etc..