Hi. Thanks for your query. Noted the history and understood the concerns. Since you are a diagnosed cause of lower esophageal lax sphincter, the acid can come up and cause acidity related problems like esophagitis, GERD. Esomaprzole that is Nexium will reduce the acidity part but the laxity may not return to normal. Metoclopropamide or Domperidone can help you for tightening of the sphincter hence discuss this with your Doctor and get started on a proper dosages and duration. Get the other medications like antacid when on empty stomach. Sleep in reclining position. Soft bland small frequent meals. No alcohol, no tobacco in any form, no oily and spicy foods. To answer your both the queries. Q. Why me am not a patient of acidity? Since you are taking esomaprozole a PPI, the acidity might be suppressed. Q. Will the sphincter get back to normal? Try the medications as discussed above and see the results.