Why do I experience chest pain when lying down?

Reviewed by Yoshinori Abe, MD

Internal Medicine

Chest pain when lying down is often caused by non-cardiac issues such as acid reflux (GERD), muscle strain, or costochondritis. However, it can also signal more serious heart or lung conditions—like pericarditis, heart failure, or pulmonary problems—that worsen in specific positions. Identifying the underlying cause matters because treatment varies significantly depending on whether the source is digestive, musculoskeletal, cardiac, or respiratory.

Because chest pain has such a wide range of possible causes—some minor, others urgent—guessing isn't a safe strategy. A free, instant, online symptom check can help you quickly narrow down likely causes based on your specific symptoms, understand which conditions may warrant urgent care, and guide your next steps with confidence before speaking to a doctor.

Reviewed for medical accuracy: 07/14/2026

Important Next Steps

Find causes of chest pain when lying down Learn if chest pain needs urgent care See if chest pain could be serious Discover OTC relief for chest pain Find a doctor for chest pain Understand home remedies for chest pain Check symptoms causing chest pain when lying down

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Explanation

When you lie down, changes in your body's position can trigger chest pain for several reasons. One common cause is acid reflux. When you're lying flat, stomach acid can more easily travel up into your esophagus, causing a burning sensation that feels like chest pain. Another possibility is that the muscles and bones in your chest may be under pressure when you lie down for a long time, leading to soreness or musculoskeletal pain. In some cases, heart-related issues can also cause pain when you recline. Since chest pain can have many different causes—from harmless to serious—it's important to identify what might be causing your discomfort. You can start by using a free symptom checker to better understand your symptoms, then talk with your doctor about your results. They can conduct tests to determine the cause and help you find the best way to feel better.

(References)

Constant J. The diagnosis of nonanginal chest pain. Keio J Med. 1990 Sep;39(3):187-92. doi: 10.2302/kjm.39.187. PMID: 2255129.
Loui WS, Blackshear JL, Fredrickson PA, Kaplan J. Obstructive sleep apnea manifesting as suspected angina: report of three cases. Mayo Clin Proc. 1994 Mar;69(3):244-8. doi: 10.1016/s0025-6196(12)61063-5. PMID: 8133662.
Zhou C, Tao J, Li S. Case report: Unruptured sinus of Valsalva aneurysms causing postural angina pectoris and false "pulmonary hypertension". Front Cardiovasc Med. 2023 Mar 22;10:1120633. doi: 10.3389/fcvm.2023.1120633. PMID: 37034326; PMCID: PMC10073471.

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