This is a nonexertional heat disorder occurring as an idiosync | Medcrine

This is a nonexertional heat disorder occurring as an idiosyncratic reaction of skeletal muscles characterized by a hypermetabolic state that occurs in response to potent inhalation anesthetic agents and depolarizing muscle relaxants that used in anesthesia practice.

This exposure results in loss of normal calcium homeostasis within the skeletal muscles.

Inhalational agents that are associated with malignant hyperthemia include;

Halothane,
Sevoflurane, and
Desflurane,

The common depolarizing muscle relaxant associated with this problem is succinylcholine (suxamethonium),
https://medcrine.com/malignant-hyperthermia