A person can get hurt when unclogging a toilet, but not from the toilet. The person might be injured by the plunger or any other tools that they are using to unclog the toilet. The plunger is often used to unclog a toilet. A plunger is a tool that has a cup-shaped end that fits into the opening of a drain and creates suction in order to remove clogs. A person might get hurt when using this tool if they have an accident with it or if they use it incorrectly by trying to use it as a crowbar, for example. There are also other tools that can be used to unclog toilets, such as rods and augers, which can also cause injury if mishandled.