Tinnitus during pregnancy may be related to changes in hormone levels, increased blood volume, anemia, auditory system diseases and autonomic nerve dysfunction. If it is accompanied by hearing loss, you need to have a hearing examination and get symptomatic treatment under the guidance of a doctor.1. Changes in hormone level: the endocrine level in the body after pregnancy is higher than before pregnancy, which will cause disorders of water and sodium metabolism in the inner ear and trigger endocrine diseases, such as abnormal thyroid function and diabetes, which can cause tinnitus.2. Increase in blood volume: it will lead to an increase in the fluctuation range of blood pressure in pregnant women and trigger systemic diseases, such as 3. Anemia: When anemia occurs in pregnant women, the ability of blood to carry oxygen is weakened, resulting in faster heart rate, dizziness, tinnitus with weakness, dry skin and other symptoms; 4. 5. Autonomic dysfunction: If pregnant women have poor rest, tension, insomnia, etc., it will lead to microcirculation disorders in the inner ear and tinnitus, so they should pay attention to keep a happy mood and get enough sleep. 6. Other causes: neurodegenerative diseases, poisoning, cervical spondylosis, temporomandibular joint diseases or malocclusion can also lead to tinnitus, so they should actively treat the original disease to improve the symptoms of tinnitus.