If you feel your ears are buzzing after drinking, it is usually for the following reasons: First, the most common reason is vasodilation after drinking too much alcohol, which triggers neurological tinnitus. When you drink too much alcohol, the ethanol in the alcohol will quickly enter the gastrointestinal tract through the esophagus, and under the action of liver acetaldehyde dehydrogenase, the ethanol will be quickly converted into acetaldehyde, which will later be converted into acetic acid. Acetaldehyde is a toxic substance that allows capillaries to expand rapidly, which can cause capillary dilation especially in the more developed areas of the ear where capillaries are distributed. Secondly, the buzzing in the ears after drinking too much alcohol is also due to the transient TIA caused by the expansion of the aorta by ethanol, which is the case of cerebrovascular insufficiency of blood supply, or the transient vascular pulsation of the aorta or the transient increase in intracranial pressure, which can lead to the buzzing behind the ears after drinking.