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A healthy oxygen saturation level ranges between 95% and 100% . If a person's levels drop below this range, they may experience symptoms associated with a lack of oxygen, such as trouble breathing and confusion.

Feeling nauseous in the morning without actually vomiting can happen for a variety of reasons, and it’s not uncommon. Let me explain a few possibilities: One common cause is acid reflux. When you lie down at night, stomach acid can move up into your esophagus, irritating it and making you feel qu....