The answer to 'sink making gurgling noise' is that a gurgling sound in a sink is typically caused by a blockage or obstruction in the drain pipe. This can be due to a buildup of debris, hair, grease, or other materials that are preventing proper water flow.
Some common symptoms of a gurgling sink include slow draining water, unpleasant odors coming from the drain, and the gurgling sound itself. To address this issue, you can try a few DIY solutions like using a plunger or a drain snake to clear the blockage. However, if the problem persists or you are unsure of the cause, it's best to call a professional plumber who can properly diagnose and fix the issue.