2 Types of Acid Reflux Doctors Often Miss (LPR & Reflux Hypersensitivity)
Normal Endoscopy, But You Still Have Reflux? You're Not Imagining It
If your endoscopy came back "normal" but the burning, the throat-clearing, or that lump-in-your-throat feeling never left, I want to say this first. You are not making it up.
A normal scope does not mean nothing is happening. It usually means the visible acid damage your doctor was scanning for wasn't there. That is a very different finding than "you're fine."
There are two reflux types that slip through standard testing again and again, because neither one behaves like textbook GERD. Let's walk through both. More importantly, let's look at why your symptoms hang on even when you're on acid blockers, or months deep into cutting foods.
The Short Version: Two Reflux Types That Get Missed
The two most overlooked are reflux hypersensitivity, where your esophagus overreacts to normal amounts of acid, and LPR (silent reflux), where refluxate reaches your throat and airway, often with no chest burning at all. Standard testing is built to catch classic GERD, so both of these tend to read as "normal."
Type 1: Reflux Hypersensitivity
This is the one that catches people off guard. With reflux hypersensitivity, your acid exposure can measure completely normal, yet your esophagus has become so sensitized that it reads that normal acid as pain.
The Rome IV criteria define it in exactly those terms: typical reflux symptoms with a clear link to reflux events, despite normal acid exposure on testing (Sawada et al., 2023). So the number on your pH study looks fine, and the symptom is still very real.
Picture it as a signaling problem more than an acid-volume problem. This is where the gut-brain axis comes in. When your nervous system is stuck in fight-or-flight, it turns up the volume on how intensely your esophagus registers sensation. Reflux hypersensitivity overlaps heavily with other gut-brain conditions like IBS and functional dyspepsia, and it often responds to nervous-system-directed therapy rather than more acid suppression alone (Gyawali & Fass, 2017).
That is why lowering acid by itself often doesn't settle things. You can bring the acid down and still feel the signal. The work here is calming the system that's amplifying it, not shrinking your plate down to five safe foods.
Type 2: LPR (Silent Reflux)
LPR frequently skips the chest entirely. It shows up higher, as:
Constant throat clearing
A lump-in-the-throat feeling
Hoarseness, chronic cough, or post-nasal drip that won't quit
One big reason acid blockers fall short here is pepsin, the stomach enzyme that rides up with refluxate and keeps irritating delicate throat and airway tissue. Biopsy studies of LPR patients show pepsin-driven changes in laryngeal tissue, including inflammatory infiltration, breakdown of the proteins that hold cells together, and DNA damage inside the cells themselves (Chen & Lechien, 2025). That's why the focus shifts toward soothing and rebuilding that tissue, not only suppressing acid. It's a different repair job.
Why More Restriction Usually Stalls
Here is the pattern I see over and over. The safe-foods list keeps shrinking, the fear around eating grows, and the symptoms stay put. If one of these two types is driving things, that makes complete sense. The root contributor was never a single food. It's a sensitized esophagus or irritated throat tissue that needs a different kind of support.
There's even evidence that strategic addition beats subtraction. In a study of 505 LPR patients, adding psyllium fiber to standard therapy resolved symptoms in 82% of people, compared with 65% on the medication alone (Rana et al., 2025). Adding the right support, not stripping the diet bare.
That's the work we do together: pinning down which type you're actually dealing with, supporting the barrier and the tissue, and calming the nervous system that may be turning everything up. Strategic addition over endless subtraction. Once you see the mechanism, you stop guessing.
For more on the nervous system side of this, read The Vagus Nerve and Reflux Connection.
Where to Start This Week
The first move is figuring out which type fits your pattern, because the path forward looks different for each one. Reflux hypersensitivity and LPR each need their own kind of support, and guessing rarely gets you there.
That's the work we do one-on-one. Together we pin down your type, support the barrier and the tissue, and calm the nervous system that may be amplifying everything, so you can stop subtracting foods and start actually healing. Work with us one-on-one here and let's map your reflux type together.
With love,
Molly Pelletier, MS, RD
References
Sawada A, Sifrim D, Fujiwara Y. Esophageal Reflux Hypersensitivity: A Comprehensive Review. Gut and Liver. 2023;17(6):831-842. PMID: 36588526. DOI
Gyawali CP, Fass R. Management of Gastroesophageal Reflux Disease. Gastroenterology. 2017;154(2):302-318. PMID: 28827081. DOI
Chen G, Lechien JR. Human Vocal Fold Tissue Modifications Related to Laryngopharyngeal Reflux Disease: A Systematic Review. Journal of Voice. 2025. PMID: 40328554. DOI
Rana AK, Sharma R, Verma M, Singh AD, Mehrotra A. Efficacy of Psyllium Husk as an Adjunct to PPI in Treating Laryngopharyngeal Reflux: A Clinical Perspective. Indian J Otolaryngol Head Neck Surg. 2025;77(4):1745-1752. PMID: 40226240. DOI
