What Causes Stomach Acid and How to Soothe It?

Have you ever felt an uncomfortable burning sensation in your chest after a meal or woken up in the middle of the night with a sour taste in your mouth? Stomach acid is the hero of our digestive tract, turning every bite into energy. In this detailed guide, we will discover how it works, what can go wrong, and how to find the perfect balance for a healthy digestive system.

What is stomach acid and when does it become a problem?

Stomach acid is essential for our digestive system because it breaks down food into smaller particles, allowing the body to easily absorb vitamins, minerals, and other beneficial elements. It also protects us from potential infections by destroying bacteria and microorganisms that enter our bodies through food. Without it, digestion would be impaired, leading to bloating, gas, and nutritional deficiencies.

The problem arises when acid production is excessive or when it escapes into the esophagus, where it shouldn't be. When this happens, our body sends warning signals: heartburn, a sour taste in the mouth, esophageal irritation, bloating, and gas. Additionally, chest pain, coughing, difficulty swallowing, bad breath, insomnia, and an increased appetite for sour foods may occur. Long-term problems with excess acid pose a risk for developing more serious conditions like esophageal damage or GERD (gastroesophageal reflux disease).

Acid in the mouth and on the tongue

The feeling of acid in the mouth and on the tongue is mostly associated with acid reflux, a condition where stomach contents flow back into the esophagus and reach the oral cavity. This causes an unpleasant sour taste, often accompanied by irritation and a burning sensation on the tongue. When acid irritates the tissues of the mouth, redness and sensitivity to certain foods occur.

Besides reflux, causes can include dehydration, as a lack of fluids reduces saliva production, which is key for neutralizing acid. Poor oral hygiene leads to the fermentation of food debris, creating acidity. An improper diet with too much lemon, tomato, and carbonated drinks disrupts the natural pH balance and can damage tooth enamel. Stress also alters acid levels in the body, leading to an unpleasant taste.

Most common causes of increased acid secretion

Excess acid production and difficult digestion are most commonly caused by:

• Improper diet: Consuming overly spicy, fatty, acidic, and fried foods, citrus fruits, tomatoes, and carbonated drinks. Overeating, especially late at night, increases pressure on the stomach.
• Caffeine, alcohol, and nicotine: Coffee, tea, energy drinks, alcohol, and cigarettes irritate the stomach lining and weaken its natural defenses.
• Gastrointestinal disorders: Infection with Helicobacter pylori triggers the stomach to produce more acid to fight the bacteria.
• Medications: Long-term use of nonsteroidal anti-inflammatory drugs (like ibuprofen) can irritate the mucosa.
• Physical factors and stress: Abdominal pressure due to obesity or pregnancy increases the likelihood of reflux. Chronic stress alters chemical balance and stimulates acid production.

Which foods soothe the stomach, and which irritate it?

Foods that trigger acid: Spicy foods (chili, black pepper), fatty and fried meals slow down digestion and increase acid. Acidic foods like tomatoes, lemons, oranges, pineapples, and sodas raise acidity. High-fat dairy products, chocolate, and mint relax stomach muscles and facilitate reflux. Processed foods full of salt and additives also stimulate secretion.

Foods and drinks that soothe: Bananas help reduce irritation due to their neutral pH, while oatmeal absorbs excess acid. Ginger acts as a natural anti-inflammatory for heartburn, yogurt improves digestion with probiotics, and almonds neutralize acid with their alkaline nature. Warm water with honey, herbal teas (chamomile, mint, fennel), and aloe vera juice are highly recommended beverages.

What to use against stomach acid?

A proper diet and healthy habits are key. Eat smaller, more frequent meals, and avoid lying down right after eating—wait at least 2 to 3 hours. Wear comfortable clothes that don't press on your stomach.

Among natural remedies, half a teaspoon of baking soda in water can quickly neutralize acid, while chewing sugar-free gum increases saliva production. If symptoms are frequent, over-the-counter antacids neutralize acid quickly, while proton pump inhibitors (like omeprazole or pantoprazole) reduce its production. Always consult your doctor to avoid complications like ulcers or GERD through self-medication.