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Acid reflux, also known as gastroesophageal reflux, is a condition where stomach acid rises into the oesophagus, causing a burning sensation known as heartburn. This occurs when the lower oesophageal sphincter (LES), a circular muscle at the bottom of the oesophagus, weakens or relaxes, allowing acid to pass through. While certain foods, medications, and lifestyle factors can contribute to acid reflux, it is unclear if weak stomach muscles are a direct cause. However, muscle trigger points in the abdominal wall and psoas muscle can cause abdominal pain and nausea, mimicking acid reflux symptoms. Hiatal hernias, a type of hernia associated with acid reflux, can also affect the diaphragm muscle and contribute to acid reflux development. Treatment for acid reflux includes lifestyle changes, medications, and in severe cases, anti-reflux surgery to tighten the LES and prevent acid reflux.
| Characteristics | Values |
|---|---|
| What is acid reflux? | A burning sensation caused when acid from the stomach rises into the esophagus. |
| What causes acid reflux? | A problem with the LES, a circular muscle at the bottom of the esophagus that opens when swallowing and closes to keep substances in the stomach. Acid reflux happens when the LES weakens or relaxes, allowing acid to pass. |
| What are the symptoms of acid reflux? | Heartburn, chest pain, trouble swallowing, a feeling of acid refluxed into the windpipe, and a sore throat. |
| What are the risk factors for acid reflux? | Lying down after a large meal, smoking, chronic coughing, certain medications, and specific foods and drinks such as citrus fruits, chocolate, caffeine, and alcohol. |
| How is acid reflux treated? | Lifestyle changes, medications (antacids, H2-blockers, proton-pump inhibitors), and in severe cases, anti-reflux surgery. |
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What You'll Learn
The LES muscle and acid reflux
The lower esophageal sphincter (LES) is a circular band of muscle fibres located at the junction of the esophagus and the stomach. It acts as a valve, opening to allow food to pass into the stomach during swallowing and closing to prevent the backflow of stomach contents, including acid, into the esophagus. When the LES weakens or relaxes excessively, it fails to close completely, allowing stomach acid to leak back into the esophagus, resulting in acid reflux or gastroesophageal reflux disease (GERD).
Acid reflux, or gastroesophageal reflux, occurs when stomach acid flows back into the esophagus. This backflow of acid irritates the lining of the esophagus, leading to symptoms such as heartburn, a burning sensation in the chest, and a sour taste in the mouth. Chronic or persistent acid reflux is known as GERD, which can cause more severe complications over time.
The LES normally remains closed tightly, creating a barrier between the esophagus and the stomach. When we swallow, the LES relaxes momentarily to allow food and liquid to pass into the stomach. It then contracts again to seal off the entrance and prevent the backward movement of stomach contents. However, when the LES weakens or relaxes excessively, it fails to close completely, leading to acid reflux.
Several factors can contribute to a weakened or relaxed LES. Temporary causes include large meals, certain medications, obesity, pregnancy, and exposure to tobacco smoke. Persistent or chronic weakening of the LES can lead to the development of GERD. Hiatal hernia, a condition where part of the stomach protrudes through the diaphragm, can also affect the LES by reducing its muscular support.
To diagnose acid reflux and assess the function of the LES, tests such as esophageal manometry are used. This test measures muscle activity in the esophagus and can confirm if the LES is functioning correctly. Treatment options for acid reflux include lifestyle modifications, such as dietary changes and weight loss, as well as medications that reduce stomach acid production or neutralize existing acid. In severe cases of GERD that do not respond to conservative measures, anti-reflux surgery may be considered to strengthen the LES and prevent acid reflux.
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Hiatal hernia and acid reflux
Hiatal hernias are a common cause of acid reflux. The condition occurs when part of the stomach pushes up through a small opening in the diaphragm where the esophagus passes through, allowing acid to reflux into the esophagus and throat. This can cause a burning sensation known as heartburn, as well as other symptoms such as regurgitation, belching, and a sour taste in the mouth.
The diaphragm is a muscle that separates the chest and abdominal cavities. Typically, the stomach sits entirely below the diaphragm. However, in people with hiatal hernias, part of the stomach slips up through the hiatus (the small opening in the diaphragm) and into the chest. This can cause the stomach to lose its ability to keep acid from refluxing into the esophagus.
There are four types of hiatal hernias. Type 1 hernias, or sliding hernias, are the most common type and occur when the stomach slides through the diaphragm and into the chest. Types II, III, and IV hernias, or paraesophageal hernias, are less common but more dangerous. They occur when a part of the stomach protrudes into the chest adjacent to the esophagus, becoming trapped' above the diaphragm because it cannot slide back down.
The exact cause of hiatal hernias is unknown, but certain factors may contribute to their development. Smoking and chronic coughing can weaken the diaphragm muscles and increase the risk of developing a hiatal hernia. Other factors such as vomiting, straining during a bowel movement, exercising, or lifting heavy objects can also put intense pressure on the surrounding muscles, potentially contributing to the formation of a hiatal hernia.
If you are experiencing chronic acid reflux, it is important to consult a healthcare professional to determine if a hiatal hernia is the underlying cause. They may recommend tests such as a chest x-ray, upper endoscopy, upper gastrointestinal series, or esophageal manometry to confirm the presence of a hiatal hernia. Treatment options may include lifestyle changes, medications, or surgery, depending on the severity of the condition and the patient's individual needs.
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Lifestyle changes to reduce acid reflux
Acid reflux, or gastroesophageal reflux, occurs when stomach acid flows back into the oesophagus. This can be due to the weakening of the lower oesophageal sphincter (LES), a circular muscle that keeps substances in the stomach. While acid reflux can be treated with medication or surgery, it can also be managed through lifestyle changes. Here are some strategies to reduce acid reflux:
Dietary Changes
Certain foods and drinks can aggravate acid reflux. It is recommended to avoid large meals, especially late in the day. Instead, opt for smaller meals and eat slowly. Avoid eating within 2-3 hours before bedtime to allow food to digest and reduce the likelihood of acid reflux. Eating in a relaxed, stress-free environment may also help.
Specific foods that are known to trigger acid reflux include fatty foods, onions, chocolate, coffee, alcohol, tea, citrus fruits and juices, carbonated drinks, and spicy foods. Keeping a heartburn diary can help identify specific triggers. It is also advised to reduce or avoid alcohol consumption, as it can irritate the oesophagus and stimulate stomach acid production.
Weight Loss
Excess abdominal fat can put pressure on the stomach, contributing to acid reflux. Losing weight, even a moderate amount, can help alleviate symptoms.
Smoking Cessation
Nicotine in cigarettes weakens the LES, making it easier for acid to pass from the stomach into the oesophagus. Quitting smoking can significantly reduce reflux symptoms.
Bed Elevation
Elevating the head of your bed by 6 inches is recommended. This can be achieved by using blocks under the bedposts. Avoid using piles of pillows, as this can increase pressure on the stomach and worsen heartburn.
Clothing
Wearing loose-fitting clothes can help reduce discomfort and pressure on the stomach, which may contribute to acid reflux.
It is important to note that while lifestyle changes can be effective in managing acid reflux, they may not work for everyone. If symptoms persist or become frequent, it is advisable to consult a healthcare professional for further guidance and treatment options.
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Acid reflux and surgery
Acid reflux, also known as gastroesophageal reflux disease (GERD), is a condition in which food or stomach acid rises from the stomach into the oesophagus. The oesophagus is the tube that connects the mouth to the stomach. Reflux occurs when the muscles where the oesophagus meets the stomach do not close tightly enough. A hiatal hernia can worsen GERD symptoms. It occurs when the top of the stomach pushes up through the diaphragm, squeezing in next to the oesophagus and compressing them both. This traps acid and moves the LES above the diaphragm, where it loses some of its muscular support.
If you have GERD, your doctor may recommend surgery if other treatments do not work. This surgery is called minimally invasive anti-reflux surgery. Before considering surgery, doctors may suggest lifestyle changes, such as losing weight, avoiding large meals, and elevating the head of your bed. They may also recommend over-the-counter or prescription medications such as H2 blockers or PPIs (proton pump inhibitors).
Laparoscopic Nissen fundoplication is the most common anti-reflux procedure. It is considered the 'gold standard' for treating GERD in patients who do not respond to medications. During this procedure, the top of the stomach is wrapped around the bottom of the oesophagus, repairing the valve that does not work properly in patients with GERD. This surgery can be performed without making cuts by passing a special camera on a flexible tool (endoscope) down through the patient's mouth and into their oesophagus.
Most patients are satisfied with the results of surgery, and serious complications are rare. Patients are usually discharged from the hospital the morning after surgery and can return to normal activities in 2-4 weeks. However, side effects such as abdominal bloating and difficulty swallowing may occur and tend to improve with time.
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Muscle trigger points and acid reflux
Acid reflux occurs when stomach acid rises into the oesophagus, causing heartburn and other symptoms. This happens when the lower oesophageal sphincter (LES), a circular muscle that acts as a valve at the entrance to the stomach, weakens or relaxes enough to let acid pass. While there are many causes of acid reflux, one overlooked cause is pain from muscle trigger points. These trigger points can mimic acid reflux and are often unresponsive to acid suppression drugs.
Muscle trigger points are typically found in the muscles of the anterior abdominal wall, such as the rectus abdominis sheath, the external obliques, and the psoas muscle. Trigger points in the psoas muscle can be associated with nausea. The reason why trigger points cause these symptoms is not entirely clear, but it may be due to referred pain overloading the pain receptors in the spinal cord.
To manage muscle trigger points, one can try physiotherapy with a therapist trained in myofascial release work. Alternative treatments include applying hot water bottles to the affected areas to relieve muscle tension, acupuncture or acupressure, and injecting the area with steroids if the trigger points can be clearly located and other approaches have not worked.
It is important to note that acid reflux can also be caused by various other factors, such as lifestyle choices, certain medications, connective tissue diseases, prior surgeries, and pregnancy. Lifestyle changes, such as dietary modifications, reducing alcohol and tobacco consumption, and weight loss, can help reduce acid reflux. Additionally, medications are recommended to reduce stomach acid and manage chronic acid reflux or gastroesophageal reflux disease (GERD).
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Frequently asked questions
Acid reflux is when stomach acid rises into the oesophagus, causing a burning sensation known as heartburn.
Acid reflux is caused by a problem with the Lower Esophageal Sphincter (LES), a muscle at the bottom of the oesophagus. When the LES weakens or relaxes, acid from the stomach can pass through.
Treatment for acid reflux includes lifestyle changes, medication, and in severe cases, surgery. Lifestyle changes include diet adjustments, reducing alcohol and tobacco consumption, and losing weight. Medications such as antacids, H2-blockers, and proton pump inhibitors can help reduce stomach acid. Surgery, such as fundoplication, may be considered for severe cases that do not respond to other treatments.
While the specific connection between weak stomach muscles and acid reflux is unclear, it is known that a weak or relaxed LES muscle is the primary cause of acid reflux. Weak stomach muscles may contribute to overall abdominal muscle weakness, which can affect the function of the LES. Additionally, issues with trigger points in certain abdominal muscles can cause symptoms similar to acid reflux.
