Eosinophilic chronic rhinosinusitis
This is a form of long-term sinus inflammation in which nasal polyps and reduced smell may recur. Asthma can be associated with it.
What is this condition?
This is a form of long-term sinus inflammation in which nasal polyps and reduced smell may recur. Asthma can be associated with it.
Main symptoms
Persistent nasal blockage, difficulty smelling, nasal polyps and thick discharge.
Causes
Inflammation involving eosinophils is important. Diagnosis considers the clinical pattern and test findings rather than symptoms alone.
When to see a clinician
Seek advice for persistent loss of smell or blockage, recurrent polyps after surgery, or nasal symptoms together with asthma.
Examination and tests
Nasal examination, endoscopy, blood tests and sinus imaging may be considered. Specialist assessment may be needed to establish the diagnosis and treatment plan.
Tests are selected according to your symptoms and examination. Specialist tests or procedures may require referral.
Treatment
Steroid nasal sprays and nasal irrigation are commonly considered. Selected cases need oral steroids, surgery or specialist treatments such as biologic medicines. Surgery does not guarantee that polyps will never recur.
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
Continue follow-up even after improvement. Discuss asthma treatment and report any reaction to pain medicines. Do not adjust steroid treatment without advice.
Frequently asked questions
Can nasal polyps come back after surgery?
Yes. Long-term control of inflammation and follow-up are important because recurrence can occur.
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