What are the possible causes of stomach ache when lying down on your back facing up?

Reviewed by Yoshinori Abe, MD

Internal Medicine

Stomach pain that radiates to the back when lying face-up is most commonly caused by gas or bloating, poor sleeping posture, or acid reflux. Less often, it may signal a more serious condition affecting the pancreas, gallbladder, or surrounding organs, such as pancreatitis or an ulcer.

Because back-radiating abdominal pain can range from harmless to urgent, identifying the underlying cause quickly matters. A free, instant, online symptom check can help you assess your specific symptoms, rule out serious conditions, and guide your next steps—whether that's simple at-home relief or seeing a doctor. It takes just a few minutes and could save you hours of worry.

Reviewed for medical accuracy: 07/14/2026

Important Next Steps

Discover causes of stomach pain when lying Learn if lying-back pain needs urgent care Find out what stomach pain might mean See OTC options for stomach pain relief Find a doctor for stomach pain Discover safe home remedies for stomach pain Understand if your pain needs evaluation

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Explanation

If you feel pain when you lie on your back and your abdomen stretches, it may just be due to gas or bloating in the stomach or muscular pain from being stretched. Less commonly, it may be due to a diseases of the pancreas and gallbladder that lead to inflammation and pain when they are compressed as you lie down facing upwards. To better understand what might be causing your specific symptoms, try our free AI symptom checker for personalized insights.

(References)

Sherman R. Abdominal Pain. In: Walker HK, Hall WD, Hurst JW, editors. Clinical Methods: The History, Physical, and Laboratory Examinations. 3rd edition. Boston: Butterworths; 1990. Chapter 86.
Mealie CA, Ali R, Manthey DE. Abdominal Examination. [Updated 2024 May 25]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2024 Jan-.

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