Very often a shower or bathtub drain becomes clogged. Slowly it becomes less efficient in draining the water. So one is faced with two choices once it gets so bad that the water will not drain. You can call a Plummer and pay a bunch of money or do the exact same thing that the Plummer would do.Yourself. If......you can stomach it.
Here's a simple technique you can use that won't cost you a dime and can be done immediately.
If you have a pop up type of plug in the drain you must first unscrew it, counterclockwise, as shown in the video.
Once that is out, you'll need a simple tool such as a pair of hemostats, needle nose pliers, or even some tweezers will work if that's all you have.
Then proceed to remove the debris that is clogging up the drain a little bit at a time until it is gone.