In the stomach, food tends to hang around for a little longer and this depends on a variety of factors including the amount of food you have consumed, how much fat it contains, and also the acidity of the stomach. However, all food should have left the stomach within 2 to 4 hours.
Many factors can affect body temperature. Illness, Disease and Trauma. Fever can be caused by infection or illness; this is the bodyâs way of fighting the infection. Certain diseases, such as arthritis, hyperthyroidism and leukemia may also cause elevated body temperature.
If your body temperature rises to 99.6 degrees or higher, you have a fever. How does this rise in temperature occur? The hypothalamus responds to different factors, such as infectious organisms and injury, by releasing fever-producing chemicals that change body temperature, says Catherine Park, MD, a primary care physician at Rush.