The answer to 'why is my GFCI outlet hot to touch' is that a GFCI outlet can sometimes feel warm or hot to the touch, which is usually a sign that it is functioning properly. GFCI outlets are designed to detect ground faults and quickly interrupt the flow of electricity to prevent electric shock hazards. When the GFCI senses a ground fault, it trips the outlet, which can cause it to become warm or hot.
Some common causes of a hot GFCI outlet include a faulty or malfunctioning GFCI, an overloaded circuit, or a problem with the wiring or electrical system. If the outlet continues to feel excessively hot, it's best to have a professional electrician inspect it to identify and address the underlying issue.