Managing Breathing Difficulties and Chest Pain After Flu Vaccine - Influenza

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As the second dose of the vaccine is administered?


On November 25th, I received the second dose of the vaccine, and starting from noon on November 26th, I began experiencing symptoms of shortness of breath and chest pain.
I would like to know how to handle this situation.

Nìmíng, 20~29 year old female. Ask Date: 2021/11/26

Dr. Pan Fengjuan reply Influenza


Hello, you mentioned that "As" and "ax" are not currently types of COVID-19 vaccines available in the country! If you are referring to "AZ," here is the information: The side effects of the second dose of the AZ vaccine are generally milder compared to the first dose.
The discomfort experienced is usually similar to that of the first dose, with the main side effects being pain at the injection site (45%), fatigue (25%), and fever (approximately 2.9%), which shows a significant decrease in adverse reactions compared to the first dose.
Since you mentioned experiencing shortness of breath and chest pain starting the next day, it is advisable for you to seek medical attention at a healthcare facility for a thorough physical examination and treatment by a physician.
Wishing you all the best and good health.

Reply Date: 2021/11/26

More Info


After receiving a flu vaccine, experiencing breathing difficulties and chest pain can be concerning. It is essential to understand that while some side effects are common after vaccinations, such as soreness at the injection site, mild fever, or fatigue, symptoms like chest pain and breathing difficulties warrant careful evaluation.

First and foremost, it is crucial to assess the severity and nature of your symptoms. If you are experiencing significant chest pain, especially if it feels like pressure or tightness, or if you have difficulty breathing, you should seek immediate medical attention. These symptoms could indicate a serious condition, such as an allergic reaction (anaphylaxis), myocarditis, or other cardiovascular issues, which require prompt evaluation and treatment.

In the context of vaccination, while mild respiratory symptoms can occur, they are typically transient and resolve within a few days. However, if your symptoms persist beyond a few days or worsen, it is essential to consult a healthcare provider. They may perform a physical examination, order diagnostic tests such as an electrocardiogram (ECG), chest X-ray, or blood tests to rule out any serious complications.

It is also important to consider your medical history and any pre-existing conditions. If you have a history of respiratory issues, heart conditions, or allergies, this information is vital for your healthcare provider to make an informed assessment. Additionally, if you have received multiple vaccinations in a short period, your body may be reacting to the cumulative effects of these vaccines, which can sometimes lead to unusual symptoms.

In managing your symptoms at home, you can try the following:
1. Rest: Ensure you are getting adequate rest to allow your body to recover.

2. Hydration: Drink plenty of fluids to stay hydrated, which can help alleviate some symptoms.

3. Over-the-Counter Medications: If you are experiencing mild pain or discomfort, over-the-counter pain relievers like acetaminophen or ibuprofen may help. However, consult with a healthcare provider before taking any medication, especially if you have other health conditions or are taking other medications.

4. Monitor Symptoms: Keep track of your symptoms, noting any changes in intensity or new symptoms that may arise.

If you notice any of the following warning signs, seek emergency medical care immediately:
- Severe chest pain or pressure
- Difficulty breathing or shortness of breath
- Rapid or irregular heartbeat
- Swelling of the face or throat
- Rash or hives
In conclusion, while some mild side effects can occur after vaccination, persistent or severe symptoms like chest pain and breathing difficulties should not be ignored. It is always better to err on the side of caution and consult a healthcare professional for a thorough evaluation. Your health and safety are paramount, especially if you plan to travel or engage in activities that may require you to be in good health.

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