Traumatic brain injuries represent a serious medical and public health challenge due to their frequency and severe consequences. The brain is the most complex organ in the human body and is the central part of the nervous system. Brain injuries can cause different types of structural damage, which can be microscopic or macroscopic, depending on the type and strength of the force that caused them. Diagnostics of brain injuries is essential in order to quickly and precisely determine the severity of the injury and plan appropriate therapy and reduce the risk of complications. Diagnostics of brain injuries requires a team approach and the integration of various clinical and imaging methods for precise diagnosis and successful treatment of patients. The task of the nurse after a brain injury includes health care planning to ensure systematic monitoring of the patient, facilitate communication within the team. In traumatic brain injury, nurses make nursing diagnoses that help identify the problem and guide the delivery of appropriate care. Through collaboration with a multidisciplinary team of health professionals, nurses play a key role in providing the best possible care and encouraging the patient's recovery and rehabilitation.