Can i take advil for my sore throat since i think i am catching a cold even though i have had a concussion for three weeks? will it cause a brain bleed or anything since i know i'm not really supposed to take motrin with my concussion.

Brain bleed?: Unfortunately, head injuries and concussions are common. Stuff just happens. Theoretically, Motrin and Advil might have a higher chance of bleeding in the first days after a concussion, compared to Tylenol. In reality, haven't heard of people bleeding after a concussion merely because they took a few Motrin or Advil. See: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5819847/