acoustic trauma
presbycusis (age-associated hearing loss)
Ménières disease
endolymphatic hydrops
superior canal dehiscence
acoustic neuroma
mercury or lead poisoning
ototoxic medications
neurologic disorders:
Arnold–Chiari malformation
multiple sclerosis
head injury
giant cell arteritis
temporomandibular joint dysfunction
metabolic disorders:
vitamin B12 deficiency
iron deficiency anemia
psychiatric disorders
depression
anxiety disorders
other factors:
vasculitis
Some psychedelic drugs can produce temporary tinnitus-like symptoms as a side effect
5-MeO-DET
diisopropyltryptamine (DiPT)
benzodiazepine withdrawal
intracranial hyper or hypotension caused by, for example, encephalitis or a cerebrospinal fluid leak

Objective tinnitus
Objective tinnitus can be detected by other people and is sometimes caused by an involuntary twitching of a muscle or a group of muscles (myoclonus) or by a vascular condition. In some cases, tinnitus is generated by muscle spasms around the middle ear.Spontaneous otoacoustic emissions (SOAEs), which are faint high-frequency tones that are produced in the inner ear and can be measured in the ear canal with a sensitive microphone, may also cause tinnitus. About 8% of those with SOAEs and tinnitus have SOAE-linked tinnitus, while the percentage of all cases of tinnitus caused by SOAEs is estimated at 4%. Pediatric tinnitus
Children may be subject to pulsatile or continuous tinnitus. With pulsatile tinnitus involving anomalies and variants of the vascular parts. While continuous affecting the middle/inner ear structures. CT scans are able to check for integrity of the structures, and MR scans can evaluate the nerves and potential masses or malformations. Early diagnosis can prevent long term impairments to development, imaging and categorizing whether it nonpulsatile or pulsatile tinnitus help create an efficient diagnosis. Pulsatile tinnitus
Some people experience a sound that beats in time with their pulse, known as pulsatile tinnitus or vascular tinnitus.
Intravenous leiomyomatosis is a rare condition seen exclusively in women in which leiomyomata, benign smooth muscle tumors, are found in veins. The masses are benign-appearing but can spread throughout the venous system leaving the uterus and even cause death when growing into the heart from the IVC. While the possibility that these arose de novo from the smooth muscle in the blood vessel wall was considered, chromosomal analysis suggests a uterine origin. Intravenous leiomyomata are usually but not always associated with uterine fibroids, and tend to recur. This condition is related to benign metastasizing leiomyoma, in which the masses appear in more distant locations such as the lung and lymph nodes. See also
Uterine fibroids

References
External links
IV Leiomyomas Video