Reflux heartburn occurs when stomach acid travels toward the throat. A sour taste may accompany burning that worsens after meals or lying down. NHS guidance suggests smaller meals and avoiding personal triggers. Instead of excluding many foods indiscriminately, notice repeated associations and avoid eating close to bedtime. Pharmacy remedies may provide temporary relief, but prolonged reliance does not establish the cause or always resolve it. Seek assessment for near-daily or persistent heartburn, food sticking when swallowing, repeated vomiting or unexplained weight loss. Do not stop prescribed medicines without advice.