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Don't lie down after eating.
If you're prone to acid reflux, it's important that you don't lie flat for a minimum of two hours after you've eaten a meal or snack. In fact, stand up and walk around to help encourage the gastric juices to flow in the right direction. For the same reason, while sleeping, keep your upper body elevated by placing a few books or a foam wedge underneath the mattress or propping up the legs at the head of the bed with blocks or books.