What causes lower esophageal sphincter relaxation failure?

Good question. Your question is a bit confusing. If you me what causes the les not to relax, this would be a neuromuscular disease called achalasia or perhaps chagas disease. If you are asking what makes the les relax too much, leading to gerd, that would be spicy foods, caffeine, nicotine, chocolate, peppermint, alcohol, some medications, tomatoes and their sauces as well as others.
Spasm. Involuntary contraction of the circular (ring) muscle of the esophageal sphincter.

Related Questions

Which medicines can fix damage caused to the lower esophageal sphincter?

None. There are medicines like viagra (sildenafil) which can decrease lower esophagel sphincter pressure and there are drugs that can increase GI motility, but there are no fda approved meds that raise les-lower esophageal sphincter pressure. Read more...

What are the Medical/Scientific ways of treating structural aberrancy of lower esophageal sphincter which causes GERD?

Medically-Lifestyle. & dietary changes & various Acid Blockers. There is a surgical approach that involves reducing any Hiatal herniation and surgically creating a functional valve to replace the leaky esophageal sphincter. Read more...

How to heal lower esophageal sphincter to make it tighter?

Surgery. It depends on exact pathology. Generally a gastric wrap (fundoplication) of some type. If a hiatal hernia is present it should be repaired at the same time. Procedure should be done by experienced minimally invasive surgeon. http://goo.gl/0rrqv. Read more...

How do certain foods eaten in gulps weaken the lower esophageal sphincter?

Not sure. I agree, and you would have just ruined the hot dog gorging contests if true. The lower esophageal sphincter is more functional than an anatomic vice, ergo hard to rupture. I am not endorsing gulping or gorging, but sphincter tome is determined more by ph, hormones, and diaphragm anatomy than swallowing. Read more...