2. Anesthesia

Some people experience nausea after receiving a general anesthetic. Doctors use general anesthesia on patients before surgery or other medical procedures. While under the influence of an anesthetic, the patient feels no pain because their brain cannot respond to pain signals or reflexes. Once the patient wakes up, they may experience a variety of side effects, including dry mouth, sore throat, itching, shivering, and fatigue. Of course, they may also have some feeling of nausea.

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