Yes. It is common for traumatic brain injury symptoms to develop hours or even days after the initial trauma. Insurance companies frequently attempt to argue that delayed symptoms are unrelated to the accident, but medical science clearly shows that concussions and more severe TBIs may not present fully right away. As long as there is medical documentation and a clear connection between the incident and your diagnosis, a claim can absolutely move forward. Early medical evaluation and consistent follow-up care are essential to strengthening that link.