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Published on: 7/14/2026
Constipation is often caused by a low-fiber diet, dehydration, and lack of physical activity. When you don't eat enough fiber-rich foods (like fruits, vegetables, and whole grains), drink sufficient water, or move your body regularly, stools become hard, dry, and difficult to pass.
If you're experiencing constipation or other digestive concerns, understanding the root cause is the first step toward relief. Take a free, instant, online symptom check to get personalized insights based on your symptoms and clear guidance on your next steps—whether that's simple lifestyle changes or knowing when it's time to see a doctor.
Reviewed for medical accuracy: 07/14/2026
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Submit your own QuestionWhen our diet doesn't have enough fiber, our stool can become dry and hard. Fiber helps soften the stool so it can move easily through our intestines. Foods like fruits, vegetables, and whole grains are rich in fiber. If we eat lots of highly processed food, or foods that have little fiber such as fast food or snacks, our stool can become hard. Drinking enough water is also very important because water helps fiber do its job in softening the stool. Without enough water, even a diet with some fiber might not work as well. In addition to diet, not moving our body enough can also affect our digestion. A lack of exercise slows down the movement in our gut and can make stool build up harder in our colon. Taken together, a diet low in fiber and fluids along with a sedentary lifestyle can lead to uncomfortable constipation with hard stools that are difficult to pass. If you're experiencing persistent digestive issues or want to better understand your symptoms, you can take a free symptom checker test for personalized insights. Making small changes like adding more fruits, veggies, and water, and getting regular exercise may help keep stools softer and easier to pass.
(References)
Updated 2023 Nov 12]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK513291/
Rollet M, Bohn T, Vahid F, On Behalf Of The Oriscav Working Group. Association between Dietary Factors and Constipation in Adults Living in Luxembourg and Taking Part in the ORISCAV-LUX 2 Survey. Nutrients. 2021 Dec 28;14(1):122. doi: 10.3390/nu14010122. PMID: 35010999; PMCID: PMC8746799.
Sparberg M. Constipation. In: Walker HK, Hall WD, Hurst JW, editors. Clinical Methods: The History, Physical, and Laboratory Examinations. 3rd edition. Boston: Butterworths; 1990. Chapter 89.
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