Depends on the type. Linear, depressed, diastatic or basilar? Some types take 3-6 mos. To heal completely. See http://www.Childrenshospital.Org/clinicalservices/site2020/mainpages2020p4.Html. Traumatic brain injury warrants a referral to your state health division's early intervention program for periodic developmental assessments & any needed therapy. Safety-proof your home to prevent recurrence. Hope all goes well.