Why Is One Nostril Always Blocked?

By Staff WriterLast Updated Apr 17, 2020 12:44:24 PM ET
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One of the most common reasons a person's nostril can be blocked is because of nasal polyps, which are characterized by the growth of tissues in the sinuses and nasal passages. Large nasal polyps can block a person's nostril. This symptom can be similar to the symptoms of a common cold.