The short explanation
Burning in the chest and a sour taste rising into the throat soon after lying down is a typical pattern of acid reflux. When you are upright, gravity helps keep stomach contents down. When you lie flat, especially soon after a meal, acid can flow back more easily into the food pipe, which causes the burning and the sour or bitter taste. Many people notice it most at night because dinner is the biggest or latest meal of the day. Simple changes often help a lot: finishing dinner two to three hours before bed, keeping the evening meal lighter and less oily or spicy, raising the head end of the bed slightly, and avoiding tea, coffee or smoking late in the evening. If it continues despite these changes, a doctor can suggest treatment and check for other causes.
What depends on your situation
The parts of this that change from woman to woman. Uncertainty is stated, not hidden.
- Extra weight around the waist, tight clothing, pregnancy and some medicines, such as certain painkillers, make reflux more likely.
- Night-time reflux can also cause a cough, hoarse voice or disturbed sleep, which people do not always connect with acidity.
- Using extra pillows only bends the neck; raising the bed head with blocks under the legs or a wedge works better.
What this answer cannot determine
The boundary of online education. These need a clinician who can see you.
- This cannot tell you whether your symptoms are only reflux. Chest burning can sometimes have other causes, and a doctor may need to examine you or arrange tests.
Questions for your clinician
Take these with you. You can add any of them to an appointment card.
- Is this pattern typical of acid reflux?
- Which lifestyle changes are most likely to help me?
- Should I try a medicine, and for how long?
- When would I need an endoscopy?
When to seek help
Clinician-approved guidance for this topic. When in doubt, being seen is never the wrong choice.
Emergency — call 112 now
- Call 112 if chest pain spreads to your arm, jaw or back, or comes with sweating, breathlessness or fainting.
Book an appointment soon
- See a doctor within a few days if you have difficulty swallowing, food sticking, vomiting or weight loss.
Raise it at a routine appointment
- Book a routine appointment if night-time burning continues for several weeks despite changes to meal timing.
Sources
The evidence this explanation is built on.
- Heartburn and acid reflux NHS
- GERD MedlinePlus (US National Library of Medicine)
- Acid reflux (GER and GERD) in adults National Institute of Diabetes and Digestive and Kidney Diseases (NIH)
Who wrote and reviewed this
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- Author
- AskHer Editorial (AI-assisted draft) AskHer's editorial team — not an individual clinician Works in English, தமிழ், हिन्दी
- Clinical reviewer
- Nobody yet No clinician has signed this answer off, and no person on the editorial team has read it yet. That is what the “Written with AI assistance” label means. It is queued for an editor to read, and then for a clinician who works in this area. The sources it was drafted against are listed above.
- Review status
- Written with AI assistance — not yet reviewed by a person
- Last reviewed
- Not yet reviewed by a person
- Version
- 1
Correction history
Substantive changes are listed, not quietly edited away.
No corrections have been made since this answer was first published.
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