Clearing a clogged toilet is something you can usually handle on your own with a good plunger and some determination. However, if your toilet is clogged and you notice brown or stinky water coming up through your other drains call a plumber right away! You could have a blocked sewer line, which is NOT something the average homeowner or even experienced DIY'ers can handle on their own.
Smell Sewer Gas in Your House? Try This DIY Remedy Before Calling a Plumber