From Prevention Magazine, Eric Yarnell, ND suggests sipping linen flower tea.
This tea stimulates the hypothalamus to better control the temperature, and it dilates blood vessels, inducing sweating according to Yarnell.
Here's how to make it. Steep 1 tablespoon of dried herb (available in health food stores) in a cup of hot water for 15 minutes, then sip. Drink three to four cups a day.
For a high fever (above 102 degrees), take a tepid bath, which simply cools the body to match the water temperature. Bathe until your temperature decreases to 101 to 102 degrees, then sip linden flower tea to lower it even more.
There is also the homeopathic way to treat fever using Belladonna. You can get this at most drug stores now.
For more information about the use of homeopathy visit the National Institute of Health division called the National Center for Complementary and Alternative Medicine. Click here http://nccam.nih.gov/health/homeopathy/ This is a great resource of studies done on a variety of natural modalities.