Because acute constipation usually has natural causes, it can be prevented. For example, if poor diet and a sedentary lifestyle are the cause, you can prevent acute constipation by making lifestyle changes. If certain medications are the cause of acute constipation, you may not be able to stop taking these medications, but you can alleviate the symptoms with adequate fiber, fluids, and exercise. You may also need to take laxatives such as fiber supplements. Talk to your doctor about preventing acute constipation, which can lead to complications if left untreated.