What is the cause of buzzing or hissing in the head?

Buzzing or hissing in the head, often referred to as tinnitus, can result from various factors, including exposure to loud noises, ear infections, or age-related hearing loss. It may also be linked to underlying health conditions like stress, earwax buildup, or changes in blood flow. In some cases, it can be a side effect of certain medications. If persistent, consulting a healthcare professional is advisable for proper diagnosis and management.