The answer to 'why is my carpenter ant bites' is that carpenter ants do not actually bite. Carpenter ants are large black ants that can cause damage to wood structures, but they do not have the ability to bite or sting. The confusion likely comes from the fact that carpenter ants can pinch with their large mandibles, which can feel like a bite, but they are not able to puncture the skin.
Carpenter ants are attracted to moist, rotting wood and will build nests inside the wood, tunneling and causing structural damage over time. If you are experiencing issues with carpenter ants, it's important to address the underlying moisture problem and eliminate their food sources. DIY solutions like baits and sprays can be effective, but for severe infestations, it's best to call in a professional pest control technician to properly identify and treat the problem.