pH monitoring for reflux

Overview

pH monitoring for reflux is a test that measures how much acid comes up from your stomach into your food pipe (the oesophagus). It helps doctors find out if your symptoms are caused by acid reflux disease (also called GERD).

Yes, pH monitoring is a fairly common test for people with ongoing heartburn or regurgitation that does not improve with lifestyle changes or medication.

It is used for people of all ages who have symptoms of acid reflux that need further investigation, especially when the diagnosis is unclear.

Symptoms

Common symptoms

• A burning feeling in your chest (heartburn), often after eating or at night
• A sour or bitter taste in your mouth
• Regurgitation – stomach contents coming back up into your throat
• Trouble swallowing or a feeling of a lump in the throat

Symptoms in children

• Frequent spitting up or vomiting
• Irritability, especially after meals
• Poor weight gain or refusal to eat
• Coughing or wheezing that is not explained by a cold or asthma

Symptoms in older adults

• Heartburn that is less intense than in younger adults
• Chest pain that feels like a heart problem
• A chronic cough or hoarseness
• Trouble swallowing or choking episodes

Causes

Main causes

• A weak or relaxed valve between the stomach and oesophagus (the lower oesophageal sphincter) allows stomach acid to flow back up.
• A hiatal hernia – part of the stomach pushes up through the diaphragm into the chest.
• Delayed stomach emptying can increase pressure and cause reflux.

Risk factors

• Being overweight or obese
• Pregnancy
• Smoking or exposure to secondhand smoke
• Lying down soon after eating
• Eating large meals or foods high in fat, spicy foods, citrus, chocolate, or caffeine
• Drinking alcohol or carbonated drinks
• Some medicines (such as certain pain relievers or blood pressure drugs)

When to see a doctor

See a doctor urgently if:

• If you have chest pain that might be a heart attack – call emergency services immediately.
• If you have trouble breathing or feel like something is stuck in your throat.

Book a routine appointment if:

• Heartburn or regurgitation that happens two or more times a week
• Symptoms that do not go away with over-the-counter lifestyle changes or medicines
• You have had trouble swallowing or it hurts to swallow
• You have had a chronic cough or hoarse voice for weeks without a clear reason

Diagnosis

A doctor may suggest pH monitoring if you have ongoing symptoms of acid reflux and other tests, like an endoscopy, have not given a clear answer. The test is also used to check if your symptoms are linked to acid levels, especially if standard treatments haven’t helped. It can also be done along with a test called impedance to detect non-acid reflux.

Tests that may be done

• Ambulatory pH monitoring: A thin, flexible tube is placed through your nose into your oesophagus. It stays for 24 to 48 hours while you go about your normal day. You press a button on a recorder when you have symptoms. The device measures how much acid is present.
• Wireless pH monitoring (Bravo system): A small capsule is temporarily attached to the wall of your oesophagus during an endoscopy. It measures acid for about 48 hours and sends data to a receiver you wear. There is no tube in your nose.
• Impedance-pH monitoring: This combines pH measurement with a test that tracks movement of liquid and gas in the oesophagus, even if it is not very acidic.

What to expect at your appointment

Before the test, your doctor will ask you to stop taking certain medicines (like acid reducers) for a few days. The test is done in a hospital or clinic. For the typical tube test, the numbing gel is applied in your nose, and the tube is gently passed down. Some people find it slightly uncomfortable, but most can eat, sleep, and work normally. You will keep a diary of your symptoms, meals, and sleep. When the monitoring period is over, the information is analysed. The results help your doctor decide on the best treatment for you.

Treatment

Treatment for acid reflux depends on how severe your symptoms are and may include changes to your diet and lifestyle, medicines to reduce stomach acid, and occasionally surgery. Your doctor will work with you to find what helps best.

Self-care at home

• Eat smaller, more frequent meals and avoid lying down for at least 3 hours after eating
• Raise the head of your bed by 15-20 cm (6-8 inches) with blocks or a wedge pillow
• Avoid foods and drinks that trigger your symptoms, such as fatty or spicy foods, citrus, chocolate, caffeine, and alcohol
• Lose weight if you are overweight
• Stop smoking
• Wear loose-fitting clothes to avoid pressure on your stomach

Medical treatments

If self-care is not enough, your doctor may recommend medicines that reduce stomach acid, such as antacids, H2 blockers, or proton pump inhibitors. These are available over the counter or by prescription. You should never take these medicines for longer or at higher doses than your doctor advises. If symptoms continue, other tests or specialist care may be needed.

When is surgery considered?

Surgery might be considered if medicines do not work well or if you cannot take them long-term. The most common procedure is called fundoplication, where the top of the stomach is wrapped around the lower oesophagus to strengthen the valve. A newer option is a magnetic ring placed around the valve (LINX device). Your doctor will explain the risks and benefits if surgery is a possibility for you.

Living with this condition

Living with acid reflux often means being mindful of your eating and sleeping habits. Most people can keep symptoms under control with a few changes and by taking medication as prescribed. Keeping a symptom diary can help you identify triggers.

Lifestyle tips

• Eat slowly and chew food well
• Avoid eating late at night – aim to finish your last meal at least 3 hours before bed
• Stay upright after meals – do not lie down or bend over
• Choose low-acid, low-fat foods when possible
• Elevate the head of your bed to reduce night-time reflux

Diet and exercise

A balanced diet that is low in fatty and spicy foods can help. Some people find it helpful to avoid citrus, tomatoes, onions, garlic, and carbonated drinks. Gentle exercise like walking is fine, but avoid intense exercise right after eating. If you have heartburn during exercise, wait longer after meals or try different activities.

Mental health and emotional wellbeing

Living with chronic reflux can be stressful and may affect sleep, eating habits, and overall quality of life. Anxiety and worry about symptoms can make reflux feel worse. If you feel that reflux is affecting your mood or daily life, talk to your doctor. They can suggest ways to manage both the physical and emotional aspects.

Prevention

You cannot always prevent acid reflux, but you can lower your risk by maintaining a healthy weight, not smoking, eating smaller meals, and avoiding foods that trigger your symptoms. For some people, lifestyle changes are enough to prevent frequent heartburn.

Screening programmes

There is no routine screening for acid reflux. If you have risk factors such as obesity or a hiatal hernia, or if you have had reflux for a long time, your doctor may suggest an endoscopy to check the health of your oesophagus.

Complications

If left untreated

• Oesophagitis – inflammation and damage to the lining of the oesophagus
• Strictures – narrowing of the oesophagus that can make swallowing difficult
• Barrett's oesophagus – changes in the lining that slightly increase the risk of oesophageal cancer
• Chronic cough, laryngitis, or asthma-like symptoms from acid reaching your throat or lungs

Long-term outlook

For most people, acid reflux can be managed very well with lifestyle changes and medicines. Even if you need long-term care, it is possible to control symptoms and avoid complications. Regular check-ups with your doctor and sticking to your treatment plan can help keep your oesophagus healthy. The outlook is good when the condition is monitored and treated properly.

Find support

Local organisations

• Your GP surgery or local health centre · All regions
• NHS website – heartburn and acid reflux · United Kingdom

External links open third-party websites. Ruqelo Health is not responsible for external content. Listing an organisation does not imply endorsement.