The answer to 'why is my switch hot to touch' is that a switch that is hot to the touch is a sign of an electrical issue that requires immediate attention. This could indicate a problem with the wiring, the switch itself, or an overloaded circuit.
Some common causes include a loose connection, a faulty switch, or a short circuit in the wiring. If the switch is hot, it's important to turn off the power to that circuit immediately and avoid touching the switch until the issue is resolved. Attempting to fix the problem yourself can be dangerous, so it's generally best to call a licensed electrician to diagnose and repair the issue.