Any body temperature above 102.5 degrees Fahrenheit is considered a high fever, says MedicaLook. Fevers that reach 107 F or higher are exceptionally dangerous, because the majority of humans cannot survive such high internal temperatures. The Mayo Clinic advises that adults should seek immediate medical attention for fevers of 103 F or higher.Continue Reading
High fevers between 103 and 106 degrees F can cause serious side effects such as hallucinations, dehydration, confusion and convulsions, says the Mayo Clinic. Children with high fevers may experience seizures, though the Mayo Clinic notes that fever-induced seizures are rare. Milder side effects of fever include sweating, shivering, weakness and muscle aches. Adults should seek immediate medical attention if a fever is accompanied by severe physical side effects such as rashes, vomiting or seizures, or neurological side effects like severe mental confusion and sensory changes.
Infections are a common cause of fevers, and mild fevers usually are not dangerous on their own, explains WebMD. Treatment for fevers primarily involves treating the underlying issue that caused the fever. Over-the-counter acetaminophen, nonsteriodal anti-inflammatory drugs and naproxen also are used to treat fever. Fever becomes more dangerous when it results from hyperthermia or external factors such as heat stroke and medication side effects.Learn more about Medical Ranges & Levels