When you flush your toilet, if water comes up through your shower drain, this mean that you need to call a drain cleaning specialist. This means that your sewer or drain pipe needs draining cleaning or servicing. There is clog in the main artery of your home and the water is coming up in the lowest drain of your home (e.g. bathtub, sink, bottom of toilet).
Servicing St. Petersburg, FL and Pinellas County.