You'll need someone to take you home because it can take up to a day for the full effects of the sedative to wear off. Don't drive or go back to work for the rest of the day. If your doctor removed a polyp during your colonoscopy, you may be advised to eat a special diet temporarily. You may feel bloated or pass gas for a few hours after the exam, as you clear the air from your colon. Walking may help relieve any discomfort. You may also notice a small amount of blood with your first bowel movement after the exam. Usually this isn't cause for alarm. Consult your doctor if you continue to pass blood or blood clots or if you have persistent abdominal pain or a fever of 100 F (37.8 C) or higher.