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Other rare causes of hyperthermia include thyrotoxicosis and an adrenal gland tumor, called pheochromocytoma, both of which can cause increased heat production. [2] Damage to the central nervous system from brain hemorrhage, traumatic brain injury, status epilepticus , and other kinds of injury to the hypothalamus can also cause hyperthermia.
Multiple problems may compound: A mild fever in elderly persons may cause confusion, which can advance to a fall and to a fracture of the neck of the femur ("broken hip").The presentation of disease in elderly persons may be vague and non-specific, or it may include delirium or falls.
] Elderly people may have a decreased ability to generate body heat during a fever, so even a somewhat elevated temperature can indicate a serious underlying cause in geriatrics. One study suggested that the average body temperature has also decreased since the 1850s. [18]
Fever is the most common presenting symptom in sepsis, but fever may be absent in some people such as the elderly or those who are immunocompromised. [20] The drop in blood pressure seen in sepsis can cause lightheadedness and is part of the criteria for septic shock. [21]
Here’s an overview of some things that can cause chills but no fever: 1. Being in a Cold Environment ... Larger ones can cause a range of symptoms, including chills. Sometimes, you might have a ...
Periodic fever syndromes are a set of disorders characterized by recurrent episodes of systemic and organ-specific inflammation.Unlike autoimmune disorders such as systemic lupus erythematosus, in which the disease is caused by abnormalities of the adaptive immune system, people with autoinflammatory diseases do not produce autoantibodies or antigen-specific T or B cells.
Listeriosis can cause severe illness, including severe sepsis, meningitis, or encephalitis, sometimes resulting in lifelong harm and even death. Those at risk of severe illness are the elderly, fetuses, newborns, and those who are immunocompromised. In pregnant women, it may cause stillbirth or spontaneous abortion, and preterm birth is common.
Fever of unknown origin (FUO) refers to a condition in which the patient has an elevated temperature for which no cause can be found despite investigations by one or more qualified physicians. [ 1 ] [ 2 ] [ 3 ] If the cause is found, it is usually a diagnosis of exclusion , eliminating all possibilities until only the correct explanation remains.