In some patients, however, the pain
may be sharp or pressure-like, rather than burning. Such pain
can mimic heart pain
(angina). In other patients, the pain may extend to the back.
Since acid reflux is more common after meals, heartburn is more common after meals. Heartburn is also more common when individuals lie down because without the effects of gravity, reflux occurs more easily, and acid is returned to the stomach more slowly. Many patients with GERD are awakened from sleep by heartburn.