Hemangiomas are the most common benign tumours affecting the spine, with an incidence of 10–12% of the general population. Although most hemangiomas are asymptomatic, there are aggressive forms which can develop symptoms, leading patients to show signs of disability. This case report aims to highlight the importance of red flags screening, and to report the physiotherapist’s clinical reasoning that led him to refer his patient to other healthcare professionals. This case also illustrated the pre- and post-surgical treatment of a specific low back pain case in a patient affected by aggressive vertebral hemangioma and spinal cord compression. The patient is a 52-year-old man, who reported intense pain in his sacral region about three months prior, which worsened while in sitting position. The physiotherapist proceeded with a complete medical history investigation and clinical examination. After an impaired neurological examination, the patient was referred to another health professional, who diagnosed multiple vertebral hemangiomas in the patient’s lumbosacral tract. The therapeutic intervention included the patient’s post-surgical rehabilitation following a vascular embolization. This case report shows the importance of proper patient screening. Indeed, during patients’ assessment, it is paramount to recognize red flags and to investigate them appropriately. An early referral of patients with conditions that require the support and expertise of other professionals can lead to a timely diagnosis and avoid costly and unnecessary rehabilitation procedures. In this case, the interdisciplinary collaboration between physiotherapist and neurosurgeon was crucial in guiding the patient towards recovery.