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.n 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.
Episcleritis is a common condition. In most cases the problem is mild and vision is normal. The cause is often unknown. But, it may occur with certain diseases, such as: 1  Herpes zoster. 2  Rheumatoid arthritis. 3  Sjogren syndrome. 4  Syphilis.
Back to Top Causes. Both bacteria and viruses may cause urethritis. The same bacteria that cause urinary tract infections (E. coli) and some sexually transmitted diseases (chlamydia, gonorrhea) can lead to urethritis. Viral causes of urethritis include herpes simplex virus and cytomegalovirus. Other causes include: 1  Injury. 2  Sensitivity to the chemicals used in spermicides or contraceptive jellies, creams, or foams.