Why is it my gerd only rears its ugly head after lunch? never after breakfast. rarely dinner or breakfast which are when i eat the worst. bizarre

Unknown: Gerd also has many other causes, such as certain medications and food/drinks and stress. Maybe during the day while at work and eating lunch it is more stressful. In any case, it is generally not dangerous, and if it is that predictable, at least you can take some antacids before lunch. If it has been going on for years, consider an upper endoscopy to make sure there's no damage to the esophagus.