What causes diarrhea after receiving the flu vaccine?
Sep 15, 2023
Source: Cainiu Health
Dr. Guo Xiheng
Introduction
In general, diarrhea after receiving the flu vaccine may be caused by normal reactions, vaccine components, improper diet, cross-infection, gastroenteritis, or other factors. It is recommended that patients follow medical advice for symptomatic treatment. Other possible causes include intestinal dysfunction, food poisoning, etc. If symptoms are severe or persist for a prolonged period, prompt medical attention is advised.
Diarrhea generally refers to loose or watery stools. In most cases, diarrhea following a flu vaccine may be caused by normal reactions, vaccine components, improper diet, cross-infection, or gastroenteritis. Patients are advised to seek symptomatic treatment as directed by a physician. Specific analyses are as follows:
1. Normal Reaction
Common side effects after receiving the flu vaccine include fever, dizziness, headache, nausea, fatigue, and diarrhea. If diarrhea occurs after vaccination, it is likely a normal side effect of the vaccine—an expected immune response that typically resolves on its own.
2. Vaccine Components
The flu vaccine contains certain ingredients, and some individuals may be allergic to these components, leading to gastrointestinal discomfort. Patients should rest appropriately and avoid excessive fatigue to support recovery.
3. Improper Diet
After vaccination, consuming raw, cold, spicy, greasy, or irritating foods may stimulate the gastrointestinal tract, causing symptoms such as diarrhea and abdominal pain. It is recommended to visit a hospital early for evaluation. Under medical guidance, adjust your diet, maintain good food hygiene, and avoid spicy or irritating foods.
4. Cross-Infection
If syringes or other instruments used during vaccination are not properly sterilized, cross-infection may occur, resulting in gastrointestinal discomfort. Under a doctor’s supervision, medications such as amoxicillin capsules or belladonna tablets may be used for treatment.
5. Gastroenteritis
After vaccination, activation of the immune system might temporarily reduce the body's resistance to other pathogens, potentially leading to infections such as gastroenteritis. Treatment under medical guidance may include medications like norfloxacin capsules or amoxicillin capsules.
Besides the above, other possible causes include intestinal dysfunction or food poisoning. If symptoms are severe or persist for an extended period, prompt medical attention is recommended.
