I'm having a hard time deciding if I'm having post concussive syndrome which I still do have. I only know that because I have instances where I have head pains when I do certain things like coloring with my kids or listening to music that's too loud. Anyway I'm wondering if I'm depressed or if a concussion can cause depression. I'm asking because I feel like low motivation almost like I don't care it's a really weird feeling. I can't decide anymore if I'm tired from my concussion or if I'm tired from depression. I think I know when I'm tired from my concussion because I can't listen to music anymore or watch TV or hear noises and I feel very irritable and I just need a break. But this is like a different kind of fatigue and sometimes I get muscle aches all over. I guess my real question is can a concussion cause depression?