Shower drains can clog with hair, soap and other things, preventing the water from draining properly. Keep up with regular maintenance on your drain by using a commercial chemical to pour down your drain; every once in a while, when you notice the water is up to your ankles by the end of your shower, something more needs to be done. You can, of course, call the plumber to take care of it for you, or you can do it yourself.
Drain all the standing water in the tub or shower stall.
Clean up any debris that is covering the drain trap. Remove all the hair by wiping it up with a rag or piece of toilet paper. Throw this in the garbage and do not put it down another drain.
Use the flat head screwdriver to take out the screw in the middle of the drain trap. Use a screwdriver with a magnetic head to keep you from dropping the screw and losing it down the drain. Set the screw aside.
Pull up the drain trap. Loosen it if it is stuck by carefully inserting the flat head screwdriver underneath the edges of the trap. Be careful not to scrap the finish off your tub.
Lift up the loosened drain trap, pulling out whatever mess comes with it out of your drain.