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.
Quick Facts: 1  Body temperature can change throughout the day. 2  Body temperature may be abnormal due to fever (high temperature) or hypothermia (low temperature). 3  A temperature over 38Â°C (100.4Â°F) most often means you have a fever caused by infection or illness.