Without a working drain in your shower or bathtub, a number of problems arise. While a significant number of homes have more than one toilet and almost all have more than one sink, many only have one shower or bath. When a shower drain clog or bath drain blockage crops up, it causes issues ranging from less-than-stellar hygiene to damage to the underlying plumbing.
Some bath and shower drains have screens in place, usually when the drain doesn't include an integral stopper. If your drain doesn't have such a component in place, it's easy to purchase one and place it over the open drain.
Also, be careful not to clean off too much solid or viscous material, especially on a regular basis as this can lead to bath and shower drain clogs. Hair is a particularly notable culprit and can be cleaned out of the screen following each shower or bath.
There are plenty of ways to clear out a shower drain clog. First try pouring boiling water down the drain, which is especially effective for soap and grease clogs. If that doesn't work, consider a solution: Mix 1/3 cup each baking soda and vinegar in a heat-resistant measuring cup, then pour down the drain as soon as it starts to fizz.
If you can't clear the clog with these methods or a tool like a bent coat hanger or snake, it's probably time to bring in a professional. Call your local Stamford Roto-Rooter to get your shower or bath back in good working order.