Sink Drain Smells Like Rotten Eggs

If your sink drain smells like rotten eggs, it's likely due to a buildup of organic matter, such as food scraps, hair, or soap scum. This organic matter can decompose and produce hydrogen sulfide gas, which has a strong, unpleasant odor. Hydrogen sulfide gas is also corrosive and can damage your pipes and fixtures over time.

There are a few things you can do to eliminate the smell and prevent it from coming back.

Clean the drain. The first step is to clean the drain to remove any organic matter that may be causing the smell. You can do this by pouring a cup of baking soda down the drain, followed by a cup of vinegar. Let the mixture sit for a few minutes, then flush it down with hot water. You can also use a drain snake to remove any clogs.
Use a drain cleaner. If the smell persists, you can try using a drain cleaner. Drain cleaners are available at most hardware stores. Follow the instructions on the package carefully.
Ventilate the area. If the smell is strong, open a window or door to ventilate the area. This will help to dissipate the odor.
Call a plumber. If you've tried all of the above methods and the smell still persists, you may need to call a plumber. A plumber can inspect your pipes and fixtures to determine the source of the smell and recommend the best course of action.

Here are some additional tips to help prevent sink drain smells:

Run hot water down the drain regularly. This will help to flush out any organic matter that may be accumulating.
Use a drain strainer. A drain strainer will help to catch food scraps and other debris before they can enter the drain.
Avoid pouring grease or oil down the drain. Grease and oil can clog your drain and cause odors.
Clean your kitchen sink regularly. This will help to prevent food scraps and other debris from accumulating in the sink and drain.

By following these tips, you can help to eliminate sink drain smells and keep your drains flowing freely.