What is the difference between bile reflux and acid reflux?

What is the difference between bile reflux and acid reflux?

If the valve that lets food into your stomach from your esophagus — the lower esophageal sphincter — doesn't close properly, stomach juices can wash back into your esophagus. This is commonly known as acid reflux. But if you have bile reflux, those juices may contain bile, too. Sometimes, bile is the bigger problem irritating your esophagus.