Can a Throat Infection Cause Blood in Phlegm?

Women Holding Throat with pain or Infection

Yes, a throat infection can sometimes lead to blood in phlegm, although it’s not a common symptom. When blood is present in phlegm, it is known as hemoptysis. Hemoptysis can be caused by various factors, and in the context of a throat infection, it may occur due to:

  • Inflammation: Severe inflammation in the throat and airways, often associated with infections like pharyngitis, laryngitis, or bronchitis, can potentially lead to small blood vessels becoming more fragile and prone to bleeding. Coughing forcefully to clear mucus and phlegm can exacerbate this issue.
  • Coughing: Persistent and forceful coughing, which is common with throat infections, can irritate and damage the delicate blood vessels in the throat and airways. This can result in the presence of blood in the phlegm.
  • Throat or Airway Trauma: In some cases, throat or airway trauma, such as irritation from hot foods or beverages, may lead to minor bleeding, which can mix with phlegm and be coughed up.

While the presence of blood in phlegm can be caused by a throat infection, it is essential to consider other possible causes of hemoptysis, some of which may be more serious, such as respiratory infections, lung conditions, or even systemic conditions. If you are experiencing persistent or significant hemoptysis, especially if it is accompanied by other concerning symptoms like chest pain, shortness of breath, or fever, it is important to seek medical attention promptly. A healthcare provider can assess the underlying cause, perform any necessary tests or evaluations, and recommend appropriate treatment.

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