Chronic sinusitis is sinus inflammation that lasts 12 weeks or longer, even with treatment. It causes ongoing facial pressure, nasal congestion, thick drainage, and fatigue that a typical cold never produces. If your sinus symptoms keep coming back or never fully go away, Dr. Mani Zadeh, a board-certified ENT and sinus specialist in Los Angeles, can identify the underlying cause and build a treatment plan designed to bring lasting relief.
What Is Chronic Sinusitis?
Chronic sinusitis, also called chronic rhinosinusitis, is a long-lasting inflammation of the sinus lining. Healthy sinuses produce a thin layer of mucus that drains freely into the nose. When the sinus lining becomes inflamed, it swells and blocks those drainage pathways. Mucus becomes trapped, pressure builds, and the trapped environment allows inflammation and infection to continue.
Doctors classify sinusitis by how long it lasts. Acute sinusitis resolves within four weeks and often follows a cold. Subacute sinusitis lasts four to 12 weeks. When symptoms persist beyond 12 consecutive weeks, or keep returning despite treatment, the condition is considered chronic. Chronic sinusitis is one of the most commonly diagnosed chronic illnesses in the United States, affecting an estimated 30 to 40 million Americans each year.
Symptoms of Chronic Sinusitis
Chronic sinusitis symptoms are similar to those of an acute sinus infection, but they linger for months and often fluctuate in intensity rather than disappearing. The most common symptoms include:
- Nasal congestion or blockage that makes breathing through the nose difficult
- Facial pain, pressure, or a feeling of fullness around the cheeks, eyes, or forehead
- Thick yellow or green nasal discharge
- Post-nasal drip and throat irritation
- Reduced or lost sense of smell and taste
- Headaches, ear pressure, or aching in the upper teeth
- Fatigue and difficulty sleeping
- Bad breath that does not improve with oral hygiene
The location of your pain can point to which sinuses are affected. Maxillary sinusitis causes pressure in the cheeks and upper teeth. Ethmoid sinusitis causes pain between or behind the eyes. Frontal sinusitis affects the forehead, and sphenoid sinusitis can cause deep pain behind the eyes or at the top of the head.
Cold vs. Sinusitis: How to Tell the Difference
A common cold and a sinus infection can feel nearly identical in the first few days. The key differences are duration, the pattern of symptoms, and how they change over time. A cold typically peaks around day three and steadily improves. Sinusitis either fails to improve after 10 days or improves briefly and then gets worse again, a pattern doctors call double worsening.
| Feature | Common Cold | Sinusitis |
|---|---|---|
| Duration | 7 to 10 days, steadily improving | More than 10 days, or improves then worsens |
| Facial pain and pressure | Mild, if present | Prominent, often localized to one area |
| Nasal discharge | Clear and watery at first | Thick, yellow or green, persistent |
| Fever | Low grade, early, brief | Can return or persist after the first week |
| Sense of smell | Temporarily dulled | Noticeably reduced, may not recover on its own |
| Response to rest and fluids | Improves on its own | Symptoms persist without targeted treatment |
If your cold symptoms have lasted longer than 10 days, or you felt better and then worse again, it is worth having your sinuses evaluated. You can read more about how a routine cold behaves on our common cold page.
What Causes Chronic Sinusitis?
Chronic sinusitis rarely has a single cause. In most patients, an underlying structural or inflammatory problem prevents the sinuses from draining normally, and that blockage keeps the cycle of inflammation going. Identifying the specific cause is the foundation of effective treatment.
Nasal Polyps
Nasal polyps are soft, noncancerous growths that develop in chronically inflamed sinus tissue. As they enlarge, they physically block sinus drainage and airflow. Patients with polyps often notice a progressive loss of smell along with congestion.
Deviated Septum and Structural Issues
A deviated septum, enlarged turbinates, or narrow natural drainage openings can restrict how mucus exits the sinuses. Even mild structural narrowing can be enough to trap mucus during an infection and prevent full recovery.
Allergies and Environmental Irritants
Ongoing allergic inflammation from dust, pollen, pet dander, or mold keeps the nasal lining swollen. Tobacco smoke and air pollution have a similar irritating effect. In allergy-driven cases, treating the allergy is often essential to resolving the sinusitis.
Infections That Never Fully Clear
Repeated viral infections, resistant bacteria, or fungal colonization can sustain low-grade inflammation for months. Cultures taken directly from the sinuses help identify the organism responsible when standard treatment fails.
When to See an ENT for Sinusitis
Most acute sinus infections improve with time and simple care. See an ENT specialist if any of the following apply to you:
- Symptoms have lasted longer than 10 days without improvement
- You improved briefly and then got worse again
- You have had three or more sinus infections in the past year
- Congestion, facial pressure, or post-nasal drip has persisted for 12 weeks or more
- You have noticed a reduced sense of smell or taste
- Antibiotics or nasal sprays from your primary care doctor have not resolved the problem
- Sinus symptoms are affecting your sleep, energy, or daily life
Seek urgent care immediately if you develop severe headache, swelling or redness around the eyes, vision changes, a stiff neck, or confusion. These can signal that a sinus infection is spreading beyond the sinuses and needs emergency attention.
How Dr. Zadeh Diagnoses Chronic Sinusitis
Because chronic sinusitis mimics colds and allergies, an accurate diagnosis starts with looking directly at the sinuses rather than guessing from symptoms alone. Dr. Zadeh uses several diagnostic tools at his Century City office:
- Nasal endoscopy: a thin, camera-equipped scope allows Dr. Zadeh to visually examine the nasal passages and sinus openings in a few minutes, with minimal discomfort
- Sinus CT imaging: detailed imaging maps your sinus anatomy, shows the extent of inflammation, and reveals structural blockages an endoscope cannot reach
- Sinus cultures: when infections resist standard treatment, a culture identifies the exact organism so therapy can be targeted
- Allergy evaluation: when allergies appear to be driving the inflammation, testing identifies your specific triggers
Chronic Sinusitis Treatment Options in Los Angeles
Treatment is matched to the cause and severity of your condition. Dr. Zadeh takes a conservative approach, beginning with medical therapy and reserving procedures for patients whose symptoms persist.Medical Management
Most patients start with a structured medical plan. This may include saline rinses to clear mucus and crusting, inhaled nasal steroid sprays to reduce swelling without a rebound effect, targeted antibiotics guided by culture results when a bacterial infection is present, and allergy treatment or immunotherapy when allergies contribute. Short courses of decongestants may help, though they are used carefully because overuse can worsen congestion.
Balloon Sinuplasty
Balloon sinuplasty is a minimally invasive, in-office option for appropriate patients. A small balloon is gently inflated within the natural sinus opening to widen the drainage pathway, without cutting or removing tissue. Most patients return to normal activity within a day or two.
Endoscopic Sinus Surgery
When polyps, scarring, or anatomy block the sinuses and medical therapy has not worked, endoscopic sinus surgery opens the drainage pathways under direct visualization. The procedure is performed entirely through the nostrils, with no external incisions.
Revision Sinus Surgery
Patients who have had previous sinus surgery elsewhere and still struggle with symptoms may benefit from revision sinus surgery. Dr. Zadeh has particular experience evaluating and treating cases where prior procedures did not achieve lasting relief.
Why Choose Dr. Zadeh for Sinusitis Care?
Dr. Mani Zadeh is a board-certified otolaryngologist specializing in nasal and sinus disorders. He earned his medical degree at the University of California, San Diego and completed his residency in Head and Neck Surgery at Columbia University in New York. His Los Angeles practice is built around accurate diagnosis, conservative treatment, and clear communication. Patients consistently describe unhurried consultations where every question is answered before any decision is made.
The Los Angeles Sinus Institute is located in Century City and serves patients throughout the greater Los Angeles area, including Beverly Hills, Westwood, Santa Monica, and West Los Angeles.
Frequently Asked Questions About Chronic Sinusitis
Acute sinusitis usually resolves within seven to 10 days, and almost always within four weeks. Subacute sinusitis lasts four to 12 weeks. When symptoms continue beyond 12 consecutive weeks, the condition is classified as chronic sinusitis and typically will not resolve without identifying and treating the underlying cause.
A cold peaks within a few days and steadily improves over seven to 10 days. Sinusitis lasts longer than 10 days, causes prominent facial pain or pressure, and produces thick yellow or green discharge. A telltale sign is feeling better and then suddenly worse again, which suggests a sinus infection has developed after a cold.
See a doctor if symptoms last more than 10 days, worsen after initially improving, or include fever, severe facial pain, or a reduced sense of smell. See an ENT specialist if you have had three or more sinus infections in a year or if symptoms have persisted for 12 weeks despite treatment. Swelling around the eyes, vision changes, or severe headache warrant immediate medical attention.
Chronic sinusitis rarely resolves without treatment because an underlying problem, such as polyps, allergies, or a structural blockage, keeps the inflammation going. The encouraging news is that once the cause is identified, effective treatment options exist for nearly every patient, from medical therapy to minimally invasive procedures.
Untreated chronic sinusitis can lead to worsening congestion, permanent changes in smell, asthma flare-ups, and repeated infections. In rare cases, infection can spread to the eyes or the lining of the brain. Persistent symptoms deserve a proper evaluation well before complications develop.
Diagnosis and medically necessary treatment for chronic sinusitis, including sinus surgery and balloon sinuplasty when indicated, are typically covered by insurance. Our office staff can verify your benefits and explain any out-of-network considerations before your visit.
Schedule a Sinusitis Evaluation with Dr. Zadeh
You do not have to keep managing sinus pressure, congestion, and fatigue on your own. Dr. Zadeh, a sinusitis specialist in Los Angeles, will identify what is driving your symptoms and recommend a treatment plan tailored to you. Call 310-286-0123 or request an appointment online to schedule your consultation at our Century City office.