The Drain Snake  

If you ask the pros like those at Express Plumbing & Septic about the best way to unclog a shower drain, they will most likely suggest the drain snake. This is a retractable, coil-like tool you can purchase at any home improvement store. Fitted with a hand crank, you insert the metal wire slowly down your shower drain, where it will either break up the clog or pull out whatever was clogging the drain. If you don’t trust yourself with this tool, or just don’t want to purchase one, consider calling up your local plumber for assistance.  

Natural Drain Cleaner 

If you want to pour something down your drain in hopes of getting rid of the clog, many suggest you not use drain cleaners found in stores, since they often don't work very well and contain dangerous chemicals that can do more harm than good to your shower drain. Instead, opt for a homemade natural drain cleaner that consists of one cup of distilled vinegar and one cup of baking soda. Mix this together, pour it down your drain, and let it stay there for 15 minutes. By doing so and then pouring a pot of boiling water down the drain, your problem should be solved. 

Call a Plumber 

Finally, if your best efforts don't work on your shower drain, call in a plumber to fix the problem. If you don't, you may damage your drain or push the clog further and further down, making things much worse.