If phlegm lasts for several weeks, changes color, or comes with fever or breathing difficulty, medical advice is necessary. Persistent symptoms may indicate infection, allergies, or another condition requiring professional care.

9. Focus on long-term habits

In most cases, throat phlegm improves with simple lifestyle adjustments: proper hydration, clean air, balanced nutrition, and healthy breathing patterns. Understanding why mucus forms—and supporting the body’s natural ability to clear it—is the safest and most effective approach.