Postnasal drip occurs when excess mucus from the nose or sinuses flows down the back of the throat. It is a common symptom that is rarely life‑threatening but can reduce comfort and disturb sleep; sometimes it points to an underlying issue that benefits from medical assessment. Below are typical causes, common signs, when to seek care, and which specialists may be involved.
Postnasal drip has multiple causes. Frequent triggers include allergic reactions, upper respiratory infections (such as the common cold), sinus inflammation (sinusitis), structural nasal differences, and gastroesophageal reflux. Environmental irritants like tobacco smoke or dry air and side effects of some medications can also increase mucus production. Identifying likely triggers helps guide the next steps.
People with postnasal drip often report a persistent tickle or clearing sensation in the throat, frequent throat‑clearing, chronic cough, a sensation of mucus when swallowing, or an altered taste. Symptoms may be worse at night and can disturb sleep or daily activities, causing tiredness or throat soreness over time.
Short episodes tied to a recent cold often improve on their own, but persistent, worsening, or recurrent symptoms warrant medical review. Seek prompt medical attention if you experience severe shortness of breath, high fever, difficulty swallowing, or any significant bleeding from the nose or mouth — these are reasons to go to emergency services.
Initial evaluation can be done by a primary care clinician or an ear, nose and throat (ENT) specialist. Allergy and immunology clinics can assess suspected allergic causes; gastroenterology may be involved if reflux is suspected. Evaluation usually focuses on symptom history, potential triggers, and a basic ENT exam; further testing or referrals are arranged when needed.
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