How long do fevers last?
Fever is just a symptom of any underlying bacterial or viral infection and so, duration of fever depends on that particular causative organism. Usually, most fevers usually go away in 1 to 3 days in adults.
Blankets alone can not increase fever, however, during fever it is suggestbale to use light blankets so that heat dissipation can be effective.
Normally, core body temperature is low in the morning and increases by few degree by the evening. So, a fever that was slight during the day can easliy spike by the night. Additionally, cortisol releases as a response to infection which is believed to be a protective mechanism against over activation of inflammatory system in the body. During night time, this protective mechanism is missed due to low cortisol levels and fever increases due to activation of inflammatory system.
Cold water either in the form of drinking or tepid sponging helps in controlling core body temperature in fever. Drinking water maintains hydration during the stress of fever on the body. Tepid sponging helps by vasodilating blood vessels and evaportaion technique.
Fever is just a symptom of any underlying infection or inflammation and it will come down only when the cause is treated. Cold water either in the form of drinking or tepid sponging helps in controlling core body temperature in fever.