Skip to content
How It Works
Explore
Resources Ask a Question
Who It's For
Patients
Decode results, prep for appointments, weigh options.
Caregivers & advocates
Carry the research load for someone you love.
Providers & clinicians
Resources for patients in your practice.
Log In Ask a Question
PubMed This is a summary of 15 peer-reviewed journal articles Updated
Otolaryngology

Treatment Strategies and the Path to Relief

At a Glance

Chronic ethmoidal sinusitis is treated through a step-by-step approach starting with daily saline rinses and steroid sprays. If medical therapy fails after 4 to 12 weeks, Functional Endoscopic Sinus Surgery (FESS) or biologic medications may be recommended to improve long-term symptom control.

Managing chronic ethmoidal sinusitis is often a marathon rather than a sprint. Because this condition involves long-term inflammation of the sinus lining, the goal of treatment is not just to “fix” the sinuses once, but to achieve long-term control of symptoms and improve your quality of life.

The “Medical First” Approach

Before considering surgery, international guidelines like EPOS 2020 recommend a rigorous course of medical therapy [1]. This is often called Appropriate Medical Therapy (AMT) and typically includes:

  • Intranasal Corticosteroids: Sprays or rinses that deliver medicine directly to the inflamed tissue to reduce swelling [2].
  • Saline Irrigation: High-volume nasal rinses (such as a neti pot or squeeze bottle) that help clear out thick mucus, allergens, and inflammatory debris [3]. Critical Safety Warning: You MUST use distilled, sterile, or previously boiled and cooled water for your rinses. Using plain tap water carries a rare but fatal risk of brain infections.
  • Oral Steroids or Antibiotics: In some cases, a short course of oral medication (like prednisone) may be used to “reset” the system during a severe flare-up [1]. Short courses are specifically designed to minimize risks (like weight gain or mood swings) while rapidly decreasing severe swelling so your topical therapies can work.

It may take several weeks of consistent use before you feel a noticeable difference; relief is usually gradual over the 4 to 12 weeks of therapy.

When Medicine Isn’t Enough: FESS

If symptoms persist after 4 to 12 weeks of dedicated medical therapy, your doctor may discuss Functional Endoscopic Sinus Surgery (FESS) [4][5].

The word “functional” is key: the goal is to restore the natural function of the sinuses. In the ethmoids, this involves opening the “honeycomb” air cells to create a single, larger cavity [6]. This does two things:

  1. Restores Drainage: It clears the osteomeatal complex (the drainage hub), allowing mucus to flow out naturally [7].
  2. Improves Access: It creates a pathway so that your medicated sprays and rinses can finally reach the deep lining of the sinuses where they are needed most [4].

It is important to remember that surgery is rarely a “cure” on its own. For many, it is a way to make medical therapy more effective. Recurrence of inflammation or polyps is common, and nearly half of patients with recurrent disease may eventually need a follow-up procedure [8].

The Role of Biologics

For patients with severe Chronic Rhinosinusitis with Nasal Polyps (CRSwNP) who do not respond to surgery or standard medicine, a new class of drugs called biologics has changed the treatment landscape [9].

Biologics like dupilumab are injectable medications that target the specific “Type 2” immune pathways (such as IL-4 and IL-13) that drive polyp growth [9][10]. According to the latest guidelines, you may be a candidate for biologics if you have bilateral polyps and meet several specific criteria, such as:

  • Evidence of Type 2 inflammation (high blood or tissue eosinophils) [11].
  • A significant loss of smell (anosmia) [11].
  • A history of at least one previous sinus surgery [12].
  • Coexisting asthma that is difficult to control [13].

Long-Term Commitment to Care

Regardless of whether you have surgery or start a biologic, long-term success depends on consistent daily care. This usually involves lifelong use of saline rinses and topical steroid sprays to keep inflammation at bay [14][3]. Regular check-ups with an ENT specialist—who can use a small camera (endoscope) to look inside your sinuses—are essential for catching and treating early signs of recurrence [15][14].

Common questions in this guide

What is the first-line treatment for chronic ethmoidal sinusitis?
The first step is typically Appropriate Medical Therapy, which includes intranasal corticosteroid sprays and high-volume saline rinses. This regimen is usually tried for 4 to 12 weeks to reduce inflammation before other interventions are considered.
Why is it important to use distilled water for sinus rinses?
You must use distilled, sterile, or previously boiled and cooled water for nasal rinses to prevent rare but potentially fatal brain infections. Organisms occasionally found in regular tap water can be extremely dangerous if introduced into the sinus cavities.
Will FESS surgery completely cure my chronic sinus inflammation?
Surgery is rarely a complete cure on its own. Instead, it clears out the honeycomb-like air cells to open the drainage pathways, which allows your daily medicated sprays and rinses to reach the deep inflamed tissues more effectively.
When are biologic medications used for chronic sinusitis?
Biologics like dupilumab may be prescribed if you have severe nasal polyps that haven't responded to standard medicines or surgery. These injectable medications target the specific immune pathways that drive polyp growth.
Do I need to keep using nasal sprays after sinus surgery?
Yes, long-term success usually requires lifelong use of saline rinses and topical steroid sprays. Keeping up with this routine is essential to prevent inflammation and polyps from returning, even after a successful surgery.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.How long should I try 'maximum medical therapy' before we consider my treatment has failed?
  2. 2.What specifically will FESS achieve in my case—is it primarily to remove polyps, open the drainage pathways, or both?
  3. 3.Based on my history and labs, do I meet the EPOS 2020 criteria for starting a biologic like dupilumab?
  4. 4.What is my risk of polyp recurrence after surgery, and how will we monitor for it?
  5. 5.What long-term medical routine will I need to follow after surgery to keep my sinuses open?

Questions For You

Tap a prompt to share your answer — we'll use it plus this page's context to start a tailored conversation.

References

References (15)
  1. 1

    European Position Paper on Rhinosinusitis and Nasal Polyps 2020.

    Fokkens WJ, Lund VJ, Hopkins C, et al.

    Rhinology 2020; (58(Suppl S29)):1-464 doi:10.4193/Rhin20.600.

    PMID: 32077450
  2. 2

    Refractory Chronic Rhinosinusitis with Nasal Polyposis.

    Hull BP, Chandra RK

    Otolaryngologic clinics of North America 2017; (50(1)):61-81 doi:10.1016/j.otc.2016.08.006.

    PMID: 27888916
  3. 3

    The effects of nasal irrigation with various solutions after endoscopic sinus surgery: systematic review and meta-analysis.

    Chen XZ, Feng SY, Chang LH, et al.

    The Journal of laryngology and otology 2018; (132(8)):673-679 doi:10.1017/S0022215118000919.

    PMID: 30070184
  4. 4

    Effect of Functional Endoscopic Sinus Surgery on Functional and Symptomatic Outcomes in Patients with Chronic Rhinosinusitis: A Cross Sectional Study.

    Migha KP, Vasu RK, Reynolds AM

    Indian journal of otolaryngology and head and neck surgery : official publication of the Association of Otolaryngologists of India 2023; (75(4)):3326-3331 doi:10.1007/s12070-023-03953-5.

    PMID: 37974850
  5. 5

    Effectiveness of extensive sinus surgery with post-operative medical management for chronic rhinosinusitis.

    Wood AJ, Zhou L, Wilkinson S, Douglas RG

    The Journal of laryngology and otology 2017; (131(S2)):S19-S24 doi:10.1017/S0022215116009361.

    PMID: 28215205
  6. 6

    A juxta-ethmoidal course of the infraorbital canal in cases with large ethmomaxillary sinuses or giant Haller cells.

    Rusu MC, Vrapciu AD, Tudose RC

    Anatomy & cell biology 2025; (58(4)):647-651 doi:10.5115/acb.25.144.

    PMID: 41140064
  7. 7

    Quantification of airflow in the sinuses following functional endoscopic sinus surgery.

    Siu J, Dong J, Inthavong K, et al.

    Rhinology 2020; (58(3)):257-265 doi:10.4193/Rhin19.387.

    PMID: 32238994
  8. 8

    Predictors and Time Interval of Chronic Rhinosinusitis Recurrence After Endoscopic Sinus Surgery.

    Alaraifi AK, Alanizy B, Alsalamah S, et al.

    Turkish archives of otorhinolaryngology 2023; (61(4)):160-165 doi:10.4274/tao.2024.2023-10-9.

    PMID: 38784953
  9. 9

    Efficacy of dupilumab in patients with a history of prior sinus surgery for chronic rhinosinusitis with nasal polyps.

    Hopkins C, Wagenmann M, Bachert C, et al.

    International forum of allergy & rhinology 2021; (11(7)):1087-1101 doi:10.1002/alr.22780.

    PMID: 33611847
  10. 10

    The interleukin-4/interleukin-13 pathway in type 2 inflammation in chronic rhinosinusitis with nasal polyps.

    Bachert C, Hicks A, Gane S, et al.

    Frontiers in immunology 2024; (15()):1356298 doi:10.3389/fimmu.2024.1356298.

    PMID: 38690264
  11. 11

    Biologics for Chronic Rhinosinusitis With Nasal Polyps: Current Status and Clinical Considerations in Korea.

    Lee KI, Ryu G, Yoo SH, et al.

    Journal of rhinology : official journal of the Korean Rhinologic Society 2025; (32(1)):1-9 doi:10.18787/jr.2025.00002.

    PMID: 40169027
  12. 12

    Interpretation of Clinical Efficacy of Biologics in Chronic Rhinosinusitis With Nasal Polyps via Understanding the Local and Systemic Pathomechanisms.

    Yang SK, Cho SH, Kim DW

    Allergy, asthma & immunology research 2022; (14(5)):465-478 doi:10.4168/aair.2022.14.5.465.

    PMID: 36174990
  13. 13

    Evaluation of Quality of Life and Pattern of Improvement of Bronchial Asthma in Chronic Rhinosinusitis Patients Treated by Functional Endoscopic Sinus Surgery.

    Sujatha S, Suja V

    Indian journal of otolaryngology and head and neck surgery : official publication of the Association of Otolaryngologists of India 2019; (71(Suppl 3)):2176-2181 doi:10.1007/s12070-019-01586-1.

    PMID: 31763316
  14. 14

    A Review of Postoperative Care Following Endoscopic Sinus Surgery for Chronic Rhinosinusitis.

    Martin WJ, Cook LM, Mirmozaffari Y, et al.

    Ear, nose, & throat journal 2025; 1455613251342957 doi:10.1177/01455613251342957.

    PMID: 40411258
  15. 15

    Diagnostic accuracy of nasal endoscopy, computed tomography and magnetic resonance imaging for chronic rhinosinusitis and sinonasal polyps: a systematic review and meta-analysis.

    Lu Y, Gao X, Wang X, et al.

    The Journal of laryngology and otology 2026; (140(4)):387-395 doi:10.1017/S002221512610437X.

    PMID: 41693180

This page provides educational information about chronic ethmoidal sinusitis treatment options. It does not replace professional medical advice, so always consult your ENT specialist for a treatment plan tailored to your condition.

Get notified when new evidence is published on chronic ethmoidal sinusitis.

We monitor PubMed for new peer-reviewed studies on this topic and email a short summary when something meaningful changes.