There are many reasons why a person who usually has regular, soft bowel movements may become constipated. New constipation may have many causes, including:

• Diet, especially if you don't include enough fruits, vegetables, and fiber in your diet each day.
• Medications, such as antidepressants, water pills (diuretics), and iron.
• Dehydration, which can occur when you increase your physical activity, during warm weather, or when an illness causes a fever or vomiting.
• Changes in your daily routines from travel or changes in your school or job, which can decrease your level of physical activity and decrease your opportunity to have a bowel movement.

New constipation caused by one of these changes will usually get better or go away if you make adjustments to your diet, fluid intake, or activity schedule.

If you cannot find the cause of your constipation or constipation does not go away after trying home treatment, you may need to see a health professional.