It's usually pretty rare for showers to suddenly become stopped up. A clog in the shower usually builds up over a long period of time, with the shower draining more slowly each day. Water starts to accumulate and sits for a long period of time, stains will start to form and mold may even grow.
Before you call a plumber or drain cleaner and have to pay a lot of money, follow these basic troubleshooting steps to try clearing the clog yourself. You can also have a peek at https://drainpro.ie/service/bath-shower-unblocking-plumber-dublin/ if you are looking for professional plumbers in Dublin.
Image Source: Google
When you are working with a shower clog, you should first remove the strainer screen plate over the shower drain and use a bent piece of wire-like from a coat hanger to fish out any kind of hair and soap scum you might see. Many times you find that it just cure the problem.
If that does not help try the next step; make sure there is about an inch or more of water sitting on top of the opening of the channel. Place the plunger or plunger cup over the opening of the channel, then move up and down with a quick movement of the company at least a dozen times to dislodge clogged.
Most of the time, that will work for smaller types of clogs. If still not cleared to move to the next step; you’ll have to make sure the bathroom floor did not have water in it to soak or clean it up somehow.