Fever is usually thought to be of an infectious orinflammatory etiology. In this brief communication, weexplore the multifaceted connections between fever andendocrine dysfunction. Impaired resistance to infectionoften leads to fever in conditions like diabetes andCushing's syndrome. Additionally, several endocrinedisorders, including hyperthyroidism, subacute thyroiditis,carcinoid syndrome, and pheochromocytoma, canmanifest as fever. Furthermore, fever can be an adverseeffect of various endocrine treatments, such asbisphosphonates and antithyroid drugs. We refer to thesescenarios as 'endocrine fever.' Increased awareness of theseclinical associations can aid in prompt diagnosis andmanagement of these conditions.Keywords: Fever, infection, immunity, adverse effect,diabetes, thyrotoxicosis