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For the most part, morning throat clearing can be due to different causes, one of them being allergies. It could also be due to postnasal drainage, causing accumulation of mucus to the back of the throat and irritating the cough reflex. For the most part, postnasal drainage can also be due to allergies.
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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.