The answer to 'sink frozen' is that a frozen sink drain is a common plumbing issue, often caused by cold temperatures or a blockage in the drain. Symptoms include slow draining water, water backing up in the sink, and potentially a frozen pipe underneath. Solutions can range from DIY methods to calling a professional plumber, depending on the severity of the freeze.
For minor freezes, you may be able to thaw the drain using boiling water, a hair dryer, or a space heater. However, if the freeze is more severe or you suspect a frozen pipe, it's best to call a licensed plumber to properly diagnose and fix the issue. They have the tools and expertise to safely and effectively address a frozen sink drain without causing further damage.