Patients aged 11 to 22 who visited the emergency room for a first concussion had an average recovery time of 12 days, while those with previous concussions took 28 days to recover and those with a second concussion within a year took 35 days on average to recover. The finding were published in the journal Pediatrics. Please take all head injuries seriously. If there is any question about the severity of injury, do not hesitate to give us a call at Associates in Pediatics and Adolescent Medicine in Baton Rouge and we will gladly see your child today.