The article presents the case of a 41-year-old man who was hospitalised because of neck and occipital pain with nausea. The patient had previously suffered an injury while riding an electric scooter. Computed tomography showed subdural haematomas and cerebral venous sinuses thrombosis, while magnetic resonance imaging confirmed intracranial hypotension. Anticoagulants were introduced. After two months, the patient was readmitted to hospital due to a sudden deterioration in his condition. Computed tomography revealed subacute subdural haematoma with mass effect. The patient was treated neurosurgically. After the procedure, consciousness disorders and left-sided paresis occurred. Follow-up computed tomography showed the presence of recurrent haematoma with intracranial hypertension. Reoperation with osteomeningeal decompression was necessary. During the following days of hospitalisation, the patient’s condition gradually improved and he was transferred to the neurological rehabilitation department. One should remember about possible consequences of intracranial hypotension, such as cerebral venous sinus thrombosis or intracerebral bleeding, which, if left untreated, may be dangerous to the life and health of patients.