Cockroaches don’t feel pain, but they still feel pressure, heat, and touch, just like humans. But unlike humans, roaches do not have a brain or spinal cord and are not conscious. However, their existence is a series of impulse and response mechanisms. Consequently, it is difficult to determine whether they feel pain or not.
It is possible that cockroaches can feel physical pain, but the extent of pain is dependent on the type and the severity of the injury. The German cockroach, for example, is highly resistant to injury, but the American cockroach is not. In the event of an injury, the American cockroach may die.
Cockroaches do not have complex neural structures, but they do have nociceptors, which are the receptors responsible for pain. Although they don’t have pain perception in the same way as vertebrates, they can detect damage to their bodies and run away. Some researchers have even carried out experiments on cockroaches to test this hypothesis. They would feel something was wrong, but wouldn’t feel pain in the way that humans do when poisoned.
Although insects don’t have pain receptors, they do feel damage and irritation. This is because pain is an emotional experience, and not related to a physical response to a stimulus. Cockroaches do, however, have a second primitive brain, located near their abdomen. Insects can also sense damage and use pheromones, which are chemical signals that indicate sexual readiness.