Post-COVID Coughing: When to Seek Chest X-Ray for Blood-Streaked Phlegm? - Internal Medicine

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What is the appropriate timing for a chest examination after being diagnosed with a condition and still experiencing hemoptysis?


Hello doctor, I was diagnosed at the end of last year and completed isolation in early January.
I continued to self-isolate until I tested negative on a rapid test.
It has been about two weeks since then, but I still often feel phlegm deep in my throat.
It does not affect my breathing (which is generally smooth), but I occasionally feel the urge to cough it up.
The phlegm I cough up is yellowish and contains blood.
I would like to ask the doctor if these symptoms after recovery require an urgent visit to a pulmonologist for a chest X-ray to check for lung fibrosis, or should I wait for a certain period before seeking further examination if the symptoms persist? Thank you, doctor.

Liao Xiansheng, 30~39 year old female. Ask Date: 2023/01/19

Dr. Hong Yuanbin reply Internal Medicine


Hello, if you cough forcefully, it can easily cause microvascular rupture in the throat, leading to blood-tinged sputum.
This should gradually improve as the cough resolves.
Whether a follow-up chest X-ray is necessary mainly depends on whether you experience shortness of breath while walking or have chest pain.
If you do, then a follow-up chest X-ray can be considered.
Thank you for your question.

Reply Date: 2023/01/19

More Info


When it comes to post-COVID symptoms, particularly coughing up blood-streaked phlegm, it is essential to approach the situation with caution and awareness of potential underlying issues. Given your recent history of COVID-19, it is understandable to be concerned about any lingering symptoms, especially those involving blood in your sputum.

Firstly, the presence of blood in phlegm, known as hemoptysis, can arise from various causes, including but not limited to irritation of the airways, bronchitis, or more serious conditions such as pneumonia, pulmonary embolism, or even malignancies. In the context of post-COVID recovery, it is important to consider that COVID-19 can lead to complications such as lung inflammation, fibrosis, or secondary infections, which may manifest as persistent cough or changes in sputum.

In your case, since you are experiencing yellow phlegm with blood, it is advisable to seek medical attention sooner rather than later. While it is possible that the blood is a result of minor irritation from coughing, especially if you have been coughing frequently, it is crucial to rule out any serious conditions. The fact that you have a history of COVID-19 adds an additional layer of complexity, as the virus can have lasting effects on lung health.

A chest X-ray is a valuable diagnostic tool that can help visualize the lungs and identify any abnormalities such as infections, fluid accumulation, or structural changes. Given your symptoms, it would be prudent to consult with a healthcare provider who can evaluate your condition and determine whether a chest X-ray is warranted. If you experience any of the following symptoms, you should seek immediate medical attention:
1. Increased Severity of Cough: If your cough worsens or becomes more persistent.

2. Shortness of Breath: Any difficulty in breathing or feeling of tightness in the chest.

3. Chest Pain: Any new or worsening chest pain, especially if it is sharp or associated with breathing.

4. Fever or Chills: If you develop a fever or experience chills, it may indicate an infection.

5. Weight Loss or Fatigue: Unexplained weight loss or significant fatigue should also be evaluated.

If your symptoms persist for more than a couple of weeks or worsen, it is advisable to follow up with a healthcare provider for further evaluation. They may recommend a chest X-ray or even a CT scan for a more detailed view of the lung structures. Additionally, they may consider other tests such as sputum analysis or bronchoscopy if necessary.

In summary, while some post-COVID symptoms may resolve on their own, the presence of blood in your phlegm is a signal that should not be ignored. It is best to err on the side of caution and consult with a healthcare professional who can provide personalized advice based on your specific situation. Early intervention can be crucial in managing any potential complications and ensuring a smooth recovery.

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