Can a runny nose be a sign of a more serious health issue?

In my recent research, I've found that a runny nose can indeed be a sign of more serious health issues. Often, it's a symptom of the common cold, but it could also indicate allergies or sinusitis. However, when it's accompanied by persistent symptoms like high fever, severe headaches, or thick green mucus, it could be a sign of a more serious infection. In rare cases, a chronic runny nose might even be linked to brain fluid leakage. So, while a runny nose is usually nothing to worry about, it's important to pay attention to any accompanying symptoms and seek medical advice if needed.

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