How many days would i stay on a bland diet following a diverticulitis attack?

Low residue diet: Low residue diet which is the opposite of high fiber for 10 to 14 days.

Depends: It depends on how bad the attack is. Sometimes diverticulitis attacks are bad enough that they require hospital admission with IV antibiotics. Sometimes they can be treated with antibiotics by mouth as an outpatient. If the attack is bad you might be kept nothing by mouth for a few days. Or it is possible that you could be kept on clear liquids for a few days while the attack resolves.