Individuals can quickly relieve heartburn by loosening tight clothing, improving posture by standing upright or by elevating the body from the waist up to help relieve the pain, according to Healthline. Chewing gum or drinking a glass of baking soda mixed with water may help neutralize stomach acid causing heartburn.
Over-the-counter medications such as antacids, protein pump inhibitors and H2 blockers help provide quick relief from heartburn, as reported by Healthline. Antacids help neutralize stomach acids, while protein pump inhibitors block acid production. H2 blockers help prevent another onset of heartburn by reducing the amount of acid the stomach makes.