Which is the primary symptom of scabies?

Itching is the primary symptom of scabies, primarily due to the body's allergic reaction to the mites, their eggs, and their waste. Scabies is caused by the Sarcoptes scabiei mite, which burrows into the skin. This burrowing action triggers a strong immune response that leads to intense itching, which often worsens at night or after a hot shower. The itch can be so severe that it results in scratching, leading to secondary infections or skin damage.

While red, swollen areas and dry skin patches can occur with scabies due to scratching and inflammation, they are not the hallmark symptom. Heat rash generally results from blocked sweat glands, which is unrelated to scabies. Itching, therefore, is the most significant and defining characteristic of this condition, facilitating its diagnosis and highlighting the need for treatment to alleviate the discomfort.