Why is my nose runny only in the morning?

A runny nose that’s worse in the morning is often due to allergies, dry air, or mucus collecting overnight and draining when you get up. Common possibilities include:

• Dust mites or pet dander in bedding: These can trigger allergic rhinitis overnight, so symptoms show up when you wake up.
• Pollen exposure: Morning pollen can irritate your nose, though timing varies by location and season.
• Dry air or temperature changes: Heated or air-conditioned air can dry out and irritate the nasal lining, causing extra mucus.
• Positional drainage: When you lie flat, mucus can build up in the nose and sinuses and seem to run more after you stand.
• Less commonly, reflux or a cold/irritation: These can also contribute in some people.

Practical steps that may help: wash bedding weekly in hot water, use dust-mite covers, keep windows closed on high-pollen nights, and try saline nasal spray in the morning.

If it comes with fever, facial pain, thick/discolored mucus, wheezing, or lasts more than a few weeks, get checked by a healthcare professional.