What characterizes malaria rubra?

Malaria rubra is characterized by being an acute inflammatory disorder of the sweat glands. This condition results in the development of red, inflamed patches on the skin, often accompanied by symptoms such as itching and discomfort due to the inflammation of the sweat glands. The acute nature of the disorder means it can manifest suddenly and visibly affect the skin, leading to the characteristic appearance that is identifiable in clinical assessments.

Other options describe different conditions or symptoms not specifically associated with malaria rubra. For example, a deficiency in perspiration pertains to anhidrosis, which is a failure of sweat glands to function properly, while an abnormal smell of perspiration might relate to bacterial growth on the skin or certain metabolic disorders. A lightly raised mark on the skin could indicate a variety of dermatological issues, but does not specifically define the inflammatory process associated with malaria rubra.