Unilateral tinnitus can be caused by insufficient blood supply or other reasons. Tinnitus is one of the more common clinical symptoms of insufficient blood supply, which is mainly due to insufficient blood supply in the brain affecting certain sensory organs and sensory nerve fibers in the brain. In addition, patients with insufficient blood supply may also experience symptoms such as unsteady walking, fatigue, dizziness, and difficulty concentrating. Unilateral tinnitus is not only caused by insufficient blood supply, but also by other causes, such as otitis media, brain tumors, eardrum damage, and foreign objects in the ear canal. Therefore, under normal circumstances, patients with unilateral tinnitus need to determine the cause of the disease under the guidance of a doctor by taking a detailed medical history and combining blood pressure, electrocardiogram, nuclear magnetic resonance imaging (NMRI) of the brain, and nuclear magnetic resonance imaging (NMRI) of the inner ear, and so on. Unilateral tinnitus may be caused by insufficient blood supply, which requires timely consultation to identify the cause.