Fever after surgery is very common. Most cases are harmless and go away on their own. Postoperative fever is when your temperature goes above 102.2 F on any day after surgery or above 100.4 F on any ...

Allergies do not cause a fever, but they may lead to health issues that can cause a fever, such as a sinus infection. Other conditions, such as bacterial or viral infections, can have similar symptoms ...

People often experience chills with a fever. They may feel very cold, shiver, or shake. They might also alternate between feeling very cold and very hot. Share on Pinterest Westend61/Getty Images Many ...