Tinnitus is the false perception of sound even in the absence of any such sound in the external environment. Tinnitus can take a variety of forms. While there are multiple potential causes of tinnitus, in most cases, no underlying cause is found. Tinnitus can be frustrating because in most cases there is no direct treatment. Medications generally are not helpful for tinnitus. Tinnitus masking under the supervision of a tinnitus audiologist can be helpful.