Blocked nose
Nasal congestion can affect breathing through the nose, sleep and feeding. Swelling, the shape of the nose or polyps may contribute.
What to know first
A blocked nose, mouth breathing, snoring or reduced smell.
When to see a clinician
Seek advice if sleep or eating is affected, symptoms persist on one side, or you rely on a nasal spray every day.
Possible causes
Allergic rhinitis, a cold, sinusitis, nasal polyps and structural narrowing are possible causes. Overuse of some decongestant sprays can worsen congestion.
Examination and tests
We examine the nasal passages. Endoscopy, allergy assessment or imaging may be considered according to the findings.
Tests are selected according to your symptoms and examination. Specialist tests or procedures may require referral.
Treatment
Inflammation may be treated with suitable medicines. Significant structural problems or large polyps may require specialist treatment.
These are general treatment options. Your clinician will discuss which approach fits your condition; not every treatment described is provided at this clinic.
What you can do at home
Avoid smoke and follow nasal spray instructions. Tell us the name and frequency of any over-the-counter spray.
Frequently asked questions
Why can a decongestant spray make blockage worse?
Frequent prolonged use of some sprays can cause rebound congestion. Bring the product so its ingredients and use can be reviewed.
What should I tell the clinician?
Tell us when symptoms began, whether they are changing, your medicines and allergies, and any relevant medical conditions. For a child, describe changes in feeding, sleep or response to sound.
Related symptoms and conditions
Visiting Honda ENT Clinic
Check temporary changes
| Day | Morning | Afternoon |
|---|---|---|
| Mon / Tue / Wed / Fri | 9:00–12:30 | 15:00–18:20 |
| Saturday | 9:00–11:00 | 14:00–16:00 |
| Closed | Thursday, Sunday and public holidays | |
Reception opens 15 minutes before each session. Walk-ins are welcome for general consultations. Vaccinations may require an appointment.
Please call before visiting if you have a fever of 37.5°C or higher, a recent positive infection test, a household member with an infection, or would like infection testing. The waiting-time service is in Japanese.
Schedules can change. Check clinic news or call before travelling.
About this information and references
This information is published by Honda ENT Clinic and is intended as general guidance. Individual diagnosis and treatment require a clinical assessment. Updated: 6 October 2026.
About Medical Director Dr. Yusuke Honda