Buzzing in the ears without external sound stimulation is tinnitus. Mild tinnitus mostly has no image, while heavy tinnitus is distracting and can cause some impact on work and study. The causes of buzzing ears are usually caused by stress, endocrine disorders, emotional instability, long-term noise exposure and various diseases. 1. Stress: If there is a lack of sleep due to stressful study or work, a short-lived buzzing sound will appear in the ears, and if this state is maintained for a long time, the tinnitus will turn into persistent. 2, endocrine disorders: usually women in menopause due to endocrine disorders, autonomic nerve dysfunction and lower estrogen secretion, resulting in buzzing in the ear. 3.Emotional instability: Patients who are in anxiety, depression and tension for a long time will have very serious tinnitus symptoms. 4.Long-term noise exposure: If you are in a serious noise environment for a long time, it will cause damage to the inner ear and thus tinnitus will appear. To sum up, usually the buzzing sound in the ear is caused by the above-mentioned reasons, and patients are advised to go to the hospital for examination in time to prevent the condition from getting worse.