Which condition is NOT a cause of diaphoresis?

Diaphoresis refers to excessive sweating, which can occur due to various physiological and psychological conditions. Cold exposure typically leads to the body's efforts to maintain core temperature, often resulting in reduced sweating rather than increased sweating. In cold environments, the body's response is to conserve heat, causing blood vessels to constrict and sweat production to decrease, which is contrary to what is seen in conditions like anxiety, heart failure, or fever where diaphoresis is a common response due to increased metabolic demands or stress on the body.

Anxiety can trigger the "fight or flight" response, leading to increased sweating. Heart failure can cause diaphoresis as a result of poor circulation and increased stress on the heart. Fever, which results from infection or inflammation, typically leads to increased body temperature, prompting the body to sweat in order to cool down. Therefore, cold exposure is the condition that does not typically contribute to diaphoresis, making it the correct choice in this context.