How Long Does Acid Reflux Last? Five Different Answers

It depends entirely on which clock you’re asking about — and that’s the reason this question gets such unsatisfying answers online.

A single reflux episode is cleared from your oesophagus in about 100 seconds on average. The burning sensation it causes typically lasts minutes to a couple of hours. A flare-up runs days to weeks. Healing damaged tissue takes 4 to 8 weeks for the oesophagus, and around 6 months for the throat. And reflux disease itself, as a condition, is usually chronic and relapsing rather than something that ends on a particular date.

So “how long does acid reflux last” has five different correct answers, ranging from 98 seconds to the rest of your life. Below, each of those clocks separately — including the one most people actually want, which is how long until this stops hurting, and the one that matters most, which is how long healing genuinely takes.

Key Takeaways

• A single acid reflux episode is cleared in a mean of 98.7 seconds — 58.6 seconds upright, but 136.7 seconds lying down.
• Clearance happens in two stages: peristalsis removes the volume in one or two swallows, then swallowed saliva neutralises what’s left.
• Heartburn as a sensation usually lasts minutes to two hours, and outlasts the acid itself because irritated nerves stay sensitised.
• The high-risk window after a meal is roughly two to three hours, which is why finishing dinner three to four hours before bed matters so much.
• Erosive oesophagitis takes 4 to 8 weeks of acid suppression to heal, and 8 weeks heals more people than 4.
• In LPR, symptoms improve over about 2 months — the reflux symptom index fell from 19.3 to 13.9 — but the visible laryngeal findings keep improving until 6 months.
• Proton pump inhibitors take around 3 days of daily dosing to reach steady-state acid suppression, so don’t judge them after one tablet.
• Acid exposure below 4% of a 24-hour period is physiological; above 6% is pathological. Everyone refluxes a little.

Clock 1: a single reflux episode — about 100 seconds

This is the shortest clock and the one with the hardest numbers behind it.

When acid comes up, two separate things have to happen. First the volume has to be pushed back down, which one or two peristaltic contractions accomplish almost completely. Then the thin residual film of acid left clinging to the lining has to be neutralised, and that’s done by swallowed saliva.

The classic experiment showed this beautifully: after acid is instilled, oesophageal pH doesn’t start rising until the first swallow arrives, roughly 30 seconds later. Stimulating saliva speeds clearance up; removing saliva abolishes it almost entirely Helm et al., The New England Journal of Medicine, 1984.

So the volume goes fast, and the acid film goes at the speed of your swallowing. Which is why saliva and bicarbonate matter far more than most people realise.

The actual timings, measured with pH-impedance monitoring: mean acid clearance time of 98.7 seconds overall. But split by posture, it’s 58.6 seconds upright and 136.7 seconds lying down — more than double Vikneswaran and Murray, BMC Gastroenterology, 2016.

And it gets worse when you’re actually asleep, not just lying down. Acid instilled into the oesophagus during sustained sleep took significantly longer to clear than the same acid while awake, with clearance speeding up the more the person woke Orr et al., Digestive Diseases and Sciences, 1981. You don’t swallow much when asleep, so the second stage of clearance essentially stops.

That’s the entire case for night-time reflux being the damaging kind, in two numbers. Same episode, several times the exposure.

How much is normal?

Worth knowing, because people are often alarmed to discover they reflux at all. Everyone does. The diagnostic threshold used internationally is that acid exposure below 4% of a 24-hour period is physiological, above 6% is pathological, and 4 to 6% is an inconclusive grey zone Gyawali et al., Gut, 2018.

4% of a day is about 58 minutes. That’s normal.

Clock 2: the heartburn itself — minutes to two hours

Here’s something that confuses people: the acid is gone in under two minutes, but the burning lasts far longer. Why?

Because the sensation isn’t a live readout of acid. Acid irritates the nerve endings in your oesophageal lining, and those nerves stay sensitised after the acid has been cleared — in the same way a scald keeps hurting after you’ve taken your hand out of the water.

Typical durations:

• A brief episode: a few minutes, often after bending, lifting or a particular mouthful.
• A typical post-meal episode: 30 minutes to 2 hours, usually settling as the stomach empties.
• A bad episode: several hours, particularly at night when you can’t clear it and can’t sit up.
• Beyond a few hours without relief: unusual for simple heartburn, and worth attention rather than endurance.

Important safety point: chest pain lasting more than a few minutes, especially with breathlessness, sweating, nausea or pain spreading to your arm, jaw or back, should never be assumed to be heartburn. Reflux and cardiac pain are genuinely hard to tell apart, and the consequences of getting it wrong run one way. Seek emergency help.

Clock 3: after a trigger — the two to three hour window

If you can point at a specific meal or drink, the relevant clock is gastric emptying.

Most meals leave the stomach over roughly two to three hours. Fatty meals, large meals and alcohol all slow that down. For as long as there’s volume in your stomach, there’s something to reflux and pressure pushing it upward — which is why overeating produces such reliable symptoms.

Alcohol extends the window considerably. In healthy volunteers given 120 ml of scotch after their evening meal, seven of seventeen had prolonged reflux episodes averaging 47 minutes each — and these kicked in around three and a half hours after the drink, well over an hour after lying down. None of them had a single such episode on the control night Vitale et al., Journal of the American Medical Association, 1987.

Note the delay. The damage wasn’t at the time of drinking; it was hours later, lying down. That’s the practical argument for leaving three to four hours between your last intake and bed — you’re not waiting for symptoms to pass, you’re waiting for your stomach to empty before you remove gravity from the equation.

Clock 4: healing — weeks to months

This is the clock that actually matters, and the one people consistently underestimate.

The oesophagus: 4 to 8 weeks

Erosive oesophagitis — visible breaks in the lining — is conventionally treated with 8 weeks of acid suppression, and the reason is straightforward: pooled analyses of the trials consistently show more people healed at 8 weeks than at 4 Yaghoobi et al., European Journal of Gastroenterology and Hepatology, 2010.

Symptoms usually improve well before the tissue does. Feeling better at two weeks does not mean you’re healed, and stopping treatment at that point is one of the more common reasons people relapse straight away.

The throat: about 6 months

This is the finding I’d most like people with throat symptoms to see, because it explains an enormous amount of frustration.

Forty patients with LPR confirmed by double-probe pH monitoring were followed on treatment and assessed at 2, 4 and 6 months. Their symptom scores improved over the first two months — the reflux symptom index fell from 19.3 to 13.9 — and then essentially plateaued, with no significant further improvement at 4 or 6 months.

But the visible findings in the larynx kept improving the whole time: 11.5 at entry, 9.4 at two months, 7.3 at four months, 6.1 at six months Belafsky et al., The Laryngoscope, 2001.

Two lessons in that. First, if you have throat symptoms, two months is roughly when you’ll know whether something is working — not two weeks. Second, and less comfortable: your throat is still inflamed and still healing long after you’ve stopped feeling much improvement. Which is exactly why people stop treatment at three months, feel fine, and relapse.

The reason throat tissue is so slow is that it has none of the defences the oesophagus has — no protective squamous adaptation, no meaningful bicarbonate rinse. That’s why LPR does damage at exposures that wouldn’t trouble GERD, and why pepsin lodged in laryngeal tissue is such a persistent problem. If you want the fuller picture, the LPR recovery timeline covers it in detail.

A realistic overall timetable

• Sore throat and hoarseness from a single bad episode: a few days to two weeks.
• Oesophagitis on treatment: 4 to 8 weeks.
• LPR symptoms: meaningful improvement by 6 to 8 weeks.
• LPR tissue healing: up to 6 months.
• A dietary change: judge at 2 weeks for heartburn, 6 weeks for throat symptoms.

Clock 5: the condition itself

Here’s the honest answer, and it’s the least popular one.

For most people, reflux disease is chronic and relapsing. It waxes and wanes, it responds to treatment, and it tends to return when treatment stops — because the things causing it (a weak or over-relaxing lower oesophageal sphincter, a hiatal hernia, excess weight, impaired motility) don’t resolve on their own.

That said, it’s genuinely not a life sentence for everyone. In population studies a substantial proportion of people with weekly reflux symptoms no longer have them six months later, without any dramatic intervention. Symptoms transition, resolve and recur far more than the “chronic disease” framing suggests.

The distinction that matters is between suppressing and addressing. Acid suppression manages symptoms while you take it. Changing the drivers — weight, meal size, meal timing, alcohol, what you eat — changes the disease. That’s the difference between reflux that lasts as long as you keep taking a tablet, and reflux that genuinely recedes. Whether LPR is permanent is a question I’ve looked at separately, and the answer is mostly no.

How long before treatment works?

Different treatments run on completely different clocks, and mismatched expectations cause a lot of unnecessary abandonment.

• Antacids: minutes. They neutralise acid already present and do nothing preventive. Effect lasts 30 to 60 minutes.
• Alginates: minutes, lasting up to about four hours. They form a physical raft on top of the stomach contents, which makes them well suited to predictable post-meal windows — Gaviscon Advance being the usual choice.
• H2 blockers: 30 to 90 minutes to act, lasting several hours.
• Proton pump inhibitors: the slow ones. Because they only disable pumps that are actively secreting, and your stomach keeps making new ones, it takes around 3 days of daily dosing to reach steady-state acid suppression Shin and Kim, Journal of Neurogastroenterology and Motility, 2013. Symptoms improve over 1 to 4 weeks. Judging a PPI after two days is the single most common mistake — see how long omeprazole takes to work and, just as importantly, when to take it, since timing relative to meals changes how well it works.
• Dietary and lifestyle change: 2 weeks for a heartburn signal, 6 weeks for throat symptoms. The two-week approach exists for exactly that reason.

And a note on PPIs for throat symptoms specifically: they’re markedly less reliable there than for heartburn, for mechanistic reasons I’ve covered in PPIs for LPR. If eight weeks has produced nothing, that’s information — don’t simply extend it indefinitely without reconsidering the approach.

When it’s lasting too long

Some things shouldn’t be waited out. Speak to a doctor if you have:

• Symptoms most days for more than 3 weeks despite over-the-counter treatment.
• Difficulty or pain on swallowing, or food sticking.
• Unintentional weight loss.
• Vomiting, black or tarry stools, or vomiting blood.
• Persistent hoarseness for more than 3 weeks.
• Reflux that has changed character, or that no longer responds to what used to work.

Long-standing untreated reflux is what drives tissue change over years, which is the mechanism behind the small but real link between reflux and oesophageal cancer. That isn’t a reason to panic about a bad week; it’s a reason not to spend a decade managing daily symptoms with antacids alone. If it’s been going on and nobody has looked, ask about getting it properly diagnosed.

Conclusion

The number worth carrying around is 98.7 seconds upright versus 136.7 lying down. Almost everything about how long reflux lasts follows from that single comparison: the episode is short if you’re vertical and your saliva is working, and long if you’re horizontal and asleep. It’s why night-time reflux does disproportionate damage, why the three hours before bed are the most valuable hours to protect, and why the position you sleep in isn’t a minor detail.

The other number worth carrying is six months — the time laryngeal tissue takes to heal, long after the symptoms have stopped improving. If you have throat symptoms, that gap between feeling better and being better is where most relapses happen.

Between those two, the practical version is short. Don’t judge anything before two weeks, or six if it’s your throat. Don’t stop when you feel better. And put your effort into the drivers rather than the symptoms, because that’s the difference between reflux that lasts as long as your prescription and reflux that actually recedes.

If the diet side is where you’re stuck, the Wipeout Food Reference Guide is the essential reference for which foods and drinks are safe with acid reflux and LPR, with the pH value of each — it removes the guesswork from the part of this you actually control.

And if you want the structured version rather than a lookup table, the Wipeout Diet Plan is the deeper approach: what to do in what order, how long to hold each phase, and how to tell healing from a good week. I built it around LPR and silent reflux — the throat-based form that takes those six frustrating months — but because it works on the same underlying mechanisms it applies just as well to GERD and everyday heartburn.

Frequently Asked Questions

How long does a single acid reflux episode last?

Acid is cleared from the oesophagus in a mean of 98.7 seconds — 58.6 seconds upright but 136.7 seconds lying down. Clearance is slower still during sleep, because you swallow far less and swallowed saliva is what neutralises the residual acid.

How long does heartburn last?

Usually minutes to two hours. It outlasts the acid itself because irritated nerve endings stay sensitised after clearance. A bad night-time episode can last several hours. Chest pain persisting beyond a few minutes with breathlessness, sweating or pain spreading to the arm or jaw needs emergency assessment, not antacids.

How long does an acid reflux flare-up last?

Typically several days to a couple of weeks, depending on what set it off and whether the trigger is still present. If it’s been more than three weeks despite over-the-counter treatment, see a doctor rather than waiting it out.

How long does it take for the oesophagus to heal?

Erosive oesophagitis conventionally takes 4 to 8 weeks of acid suppression, and more people are healed at 8 weeks than at 4. Symptoms improve well before the tissue does, so feeling better at two weeks doesn’t mean healing is complete.

How long does it take for a reflux-damaged throat to heal?

Around 6 months. Symptom scores in LPR improve over the first 2 months and then plateau, but visible laryngeal findings keep improving all the way to 6 months. This gap between feeling better and being healed is where most relapses happen.

How long does it take for omeprazole to work?

It takes around 3 days of daily dosing to reach steady-state acid suppression, because PPIs only disable pumps that are actively secreting and your stomach continually makes new ones. Symptom improvement builds over 1 to 4 weeks. Judging it after one or two doses is the commonest mistake.

Is it normal to have acid reflux every day?

Some reflux is entirely normal — acid exposure under 4% of a 24-hour period, roughly 58 minutes, is physiological. Daily symptoms are not normal. Above 6% acid exposure is considered pathological, and daily heartburn warrants proper assessment.

Does acid reflux ever go away permanently?

It can. A substantial proportion of people with weekly symptoms no longer have them six months later. But it tends to return if the drivers — weight, meal size and timing, alcohol, a hiatal hernia — are unchanged. Suppressing acid manages symptoms; changing the drivers changes the disease.

Research & References

• Study of acid clearance from the oesophagus showing a two-stage process in which one or two peristaltic sequences empty essentially all refluxate volume, after which residual acid is neutralised by swallowed saliva, with oesophageal pH not rising until the first swallow arrives, salivary stimulation shortening clearance and saliva aspiration abolishing it Helm et al., The New England Journal of Medicine, 1984.
• pH-impedance analysis reporting a mean acid clearance time of 98.7 seconds overall, 58.6 seconds in the upright position and 136.7 seconds recumbent, compared with median bolus clearance times of 12.6 to 14.2 seconds Vikneswaran and Murray, BMC Gastroenterology, 2016.
• Study instilling hydrochloric acid into the oesophagus of normal subjects while recumbent and awake versus asleep, finding clearance times significantly prolonged during sustained sleep and shortening with increasing wakefulness Orr et al., Digestive Diseases and Sciences, 1981.
• International consensus on the modern diagnosis of gastro-oesophageal reflux disease, establishing distal oesophageal acid exposure time above 6% on pH or pH-impedance monitoring as conclusive evidence of reflux disease, with values below 4% regarded as physiological and 4 to 6% as inconclusive Gyawali et al., Gut, 2018.
• Ambulatory pH monitoring study in 17 healthy volunteers finding that 120 ml of scotch whisky taken after the evening meal impaired supine oesophageal acid clearance, with 7 of 17 subjects experiencing prolonged reflux episodes averaging 47 minutes that did not occur on control nights Vitale et al., Journal of the American Medical Association, 1987.
• Pooled analysis of randomised trials of proton pump inhibitors for erosive oesophagitis across the Hetzel-Dent, Savary-Miller and Los Angeles classification systems, comparing endoscopic healing at 4 and 8 weeks and finding significant differences in reported healing rates between classification systems Yaghoobi et al., European Journal of Gastroenterology and Hepatology, 2010.
• Study of 40 consecutive patients with laryngopharyngeal reflux confirmed by double-probe pH monitoring, finding the reflux symptom index improved from 19.3 at entry to 13.9 at 2 months with no significant further improvement thereafter, while the reflux finding score improved progressively from 11.5 at entry to 9.4 at 2 months, 7.3 at 4 months and 6.1 at 6 months Belafsky et al., The Laryngoscope, 2001.
• Review of the pharmacokinetics and pharmacodynamics of proton pump inhibitors, explaining that because these drugs have short plasma half-lives and inhibit only actively secreting pumps, approximately 3 days of daily dosing are required to reach steady-state acid inhibition, with once-daily dosing achieving around 66% of maximal acid output inhibition Shin and Kim, Journal of Neurogastroenterology and Motility, 2013.