Why does it itch where the cat scratched? - briefly
Itching at the site of a cat scratch occurs due to the body's inflammatory response and the release of histamines as part of the healing process. Additionally, bacteria from the cat's claws can cause minor irritation, prompting an immune reaction.
Why does it itch where the cat scratched? - in detail
When a cat scratches the skin, it can cause an itching sensation due to several biological and physiological processes. First, the scratch itself damages the outer layer of the skin, disrupting its protective barrier. This damage triggers the body’s immune response, which includes the release of histamine—a compound that helps defend against potential infections but also causes itching and inflammation. Histamine binds to receptors in the skin, stimulating nerve endings and creating the sensation of itchiness. Additionally, cat scratches may introduce bacteria, allergens, or foreign particles from the cat’s claws or the environment into the skin. These substances can further irritate the area, prompting an immune reaction and intensifying the itch. The healing process also contributes to the itching; as the skin repairs itself, new cells form, and nerve endings in the affected area become more sensitive. Dryness or scabbing around the scratch can exacerbate the sensation. In some cases, a cat scratch may lead to a condition called cat scratch disease, caused by the bacterium Bartonella henselae, which can cause prolonged itching, swelling, and discomfort. To minimize itching and prevent complications, it is essential to clean the wound thoroughly with soap and water, apply an antiseptic, and monitor the area for signs of infection. If itching persists or worsens, consulting a healthcare professional is advisable.