What is the function of counterirritants?

Counterirritants are designed to produce a mild inflammatory reaction at the site of application, which can relieve deeper inflammation in underlying tissues. This mechanism works on the principle that this controlled irritation can distract the body from more significant pain occurring in deeper structures by stimulating local sensory nerves. As a result, the superficial inflammatory response may lead to an increased flow of blood to the area, fostering healing and providing an analgesic effect through the descending pain pathways.

The practice of using counterirritants is rooted in the understanding of how inflammation and pain processing work in the body, making option B the correct choice. It emphasizes the paradoxical idea that creating a minor irritation can alleviate discomfort from more serious issues. The other options do not align with the primary action of counterirritants in promoting relief through superficial irritation.