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Why does eating pork liver cause nausea and the urge to vomit?

Mar 21, 2025 Source: Cainiu Health
Dr. Shen Yonghua
Introduction
Under normal circumstances, nausea and vomiting after consuming pork liver may be caused by spoiled pork liver, improper cooking, allergic reactions, food poisoning, or the pungent odor stimulating the stomach. If pork liver is stored improperly, bacteria may multiply and cause the food to spoil. After consuming spoiled pork liver, the bacteria and their toxins can irritate the gastrointestinal tract, leading to symptoms such as nausea and vomiting.

Generally, feeling nauseous or wanting to vomit after eating pork liver may be caused by spoiled pork liver, improper cooking, allergic reactions, food poisoning, or odor irritation. The specific reasons are as follows:

1. Spoiled Pork Liver: If pork liver is improperly stored, bacteria may multiply and cause spoilage. Consuming spoiled pork liver can lead to gastrointestinal irritation from bacteria and their toxins, causing symptoms such as nausea and vomiting.

2. Improper Cooking: During the cooking process, if the pork liver is either undercooked or overcooked, it may affect its texture, nutritional value, and potentially produce harmful substances. Undercooked pork liver may contain bacteria or parasites, while overcooked liver can become dry and tough, making it difficult to digest and potentially causing nausea and vomiting.

3. Allergic Reaction: Some individuals are allergic to certain components in pork liver, which can trigger an allergic reaction after consumption. This may cause gastrointestinal mucosal congestion and edema, leading to symptoms like nausea and vomiting.

4. Food Poisoning: If pork liver is contaminated by bacteria such as Salmonella or Escherichia coli, or by toxins, consuming it may lead to food poisoning. This can cause gastrointestinal inflammation, resulting in symptoms such as nausea and vomiting.

5. Odor Irritation: Pork liver contains a high amount of iron, which can result in a distinct fishy odor. If the pork liver is improperly handled or its odor is not effectively removed during cooking, it may irritate the gastrointestinal tract, causing nausea and vomiting.

Before consuming pork liver, ensure it is fresh and hygienic, and try to remove any fishy odor as much as possible. When cooking pork liver, ensure it is thoroughly cooked without overcooking.

References:

[1] Chen Haozhu, Lin Guowei. "Practical Internal Medicine (15th Edition)" [M]. Beijing: People's Medical Publishing House, 2023.

[2] Qian Jiaming. "Chinese Textbook of Gastroenterology (2nd Edition)" [M]. Beijing: People's Medical Publishing House, 2022.

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