tub/shower or shower stall only?

[MistressEll]

If its a tub/shower remove the overflow plate, and remove the stopper assembly then snake from the overflow, remove whatever gook is there, then flush with water, also flush from the drain side, then replace.

If shower stall, the drain cap should be removable with a special tool.

Then you can clear the clog.

Did you use a chemical clog clearer or some scum/mineral scale remover in this area recently?