"All homeothermic animals including humans rigidly regulate their core body temperature through a variety of involuntary thermoregulatory responses, such as shivering and non-shivering thermogenesis, cutaneous vasomotor responses, sweating, piloerection and panting.
Of these, sympathetically (via sympathetic nervous system (SNS)) mediated changes in peripheral skin blood-flow (manifest as a change in peripheral temperature) are the most acutely sensitive to environmental temperature change.
However, changes in peripheral body temperature are additionally linked to changes in emotional state,
e.g. hot, clammy hands in anxiety or facial flushing in embarrassment, and can be modulated by mental imagery, hypnotic suggestion and disruption of the sense of body ownership using the rubber hand illusion and illusory self-identification with an avatar.
Together these findings suggest sensitivity of peripheral body temperature to top-down cognitive processes and a complimentary role in social communication.
(...)
In addition to bottom-up feed-forward pathways triggered by changes in skin temperature, thermoregulatory responses are also sensitive to top-down influences for example though visual imagery, temperature biofeedback and hypnotic suggestion.”
in https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0116126