A vanity drain is the most frequent drain clog to happen, and fortunately, is usually the easiest to fix.
The simplest and quickest way to attempt to unclog a vanity drain is to start under the sink by locating the “pop-up” arm. This is the device which raises and lowers the stopper. Connected to this vertical arm is a horizontal rod that goes into the drain. Just where it enters the drain is a retaining nut.
Loosen this nut (it can usually be done with your fingers) and let the arm come out of the drain. Now, above the sink, you should be able to lift the pop-up out. When you do so, it may have a lot of hair and gunk attached to it.
Do not use the sink to wash it out, as you have not yet connected the arm back to the drain! Instead, use a paper towel to clean off as much as possible. If need be, take it to another sink and wash it.
Next, use any type of hair removal/drain auger tool to see if there is still anything in the pipe that you can get to. If you can’t get to it, or don’t have any type of auger/hair removal tool, you still may be able to get to it by going to the next step.
Loosen the nuts on both sides of the p-trap. This is the pipe that has a 180 degree bend under the drain. Have a bucket under this pipe as you loosen the nuts and remove this pipe. There will be water in it, so be careful to do it over the bucket.
If there is debris in this pipe, take it to a different sink, one that does not use the same drain. Wash the inside of the pipe out, but be careful not to let all this debris go down the drain. Throw the debris away instead of letting it go back down another drain.
You’ve done it! Put the drain back on, tighten the nuts, and put the pop-up rod back in and tighten that nut as well. Keeping the bucket nearby, run water in the sink and make sure there are no leaks.