Nausea and vomiting after eating shrimp may be related to food poisoning, allergies, other diseases and so on. 1. Food poisoning: It may be that the shrimp is not stored properly or is stored for too long, resulting in the shrimp rotting and deteriorating, producing toxic substances. Consumption of such shrimp can lead to food poisoning, with symptoms such as vomiting, headache and nausea. 2. Allergy: shrimp is a common allergenic food, some people may have an allergic reaction after consumption. May show symptoms such as rhinitis, asthma, erythema, nausea, vomiting and diarrhea. 3. Other diseases: for example, the patient may have a common cold itself, which can cause loss of appetite. Irritation of the gastrointestinal tract after eating shrimp, causing nausea and vomiting. Nausea and vomiting after eating shrimp can also be seen in other causes, it is recommended to consult a doctor in a timely manner, follow the doctor’s instructions for relevant examinations, with the help of the doctor to clarify the cause, and targeted treatment or treatment.