Allergy & Asthma Specialist Serving Arizona

What Are Sinuses?

Your sinuses are four pairs of air-filled cavities located within the bones of your face and skull. They are lined with a thin layer of mucus that traps dust, germs, and other airborne particles. Tiny hair-like structures called cilia sweep that mucus, along with whatever it has captured, toward the back of the throat, where it is naturally cleared from the body.

When the sinus lining becomes inflamed, **this drainage system breaks down.** Mucus gets trapped, pressure builds, and bacteria or other pathogens can begin to grow inside the blocked cavities. That is what we call a sinus infection, or sinusitis.

The sinuses are located:

• Within the cheekbones (maxillary sinuses)
• Behind the forehead and eyebrows (frontal sinuses)
• On either side of the bridge of the nose (ethmoid sinuses)
• Behind the nose, near the base of the skull (sphenoid sinuses)

Types of Sinusitis

Sinusitis is classified based on how long symptoms last and what is causing them.

Symptoms develop suddenly and typically resolve within four weeks. Most cases are triggered by a viral upper respiratory infection, such as the common cold.

Symptoms persist between four and twelve weeks, often following an acute infection that did not fully clear.

Symptoms last twelve weeks or longer despite treatment. Chronic sinusitis is often linked to allergies, structural nasal issues, or recurring bacterial infections.

"For most of her childhood, Lindsey believed the problem was her."

For Lindsey Forstie, FNP, asthma care is deeply personal. As someone who grew up with undiagnosed asthma, she understands how easily breathing limitations can be misinterpreted as lack of endurance, motivation, or effort. That lived experience shapes how she listens, evaluates symptoms, and approaches treatment today.

At Carefree Allergy, asthma care focuses on identifying triggers and building a long term management plan that fits your life. We provide comprehensive asthma evaluation and ongoing care for patients across Arizona, with in office visits in Phoenix and telehealth follow ups available statewide.

Risk Factors

Anyone can develop a sinus infection, but certain factors increase the likelihood of recurrent or chronic sinusitis:

Nasal inflammation from allergic rhinitis can block sinus drainage pathways

Closely linked to chronic sinus inflammation

Repeated colds create repeated opportunities for secondary sinus infections

• Allergies
• Asthma
• Frequent upper respiratory infections
• Structural issues
• Weakened immune system
• Environmental exposure
• Family history of allergies or asthma

How It's Tested and Treated

A thorough sinus infection evaluation includes a review of your symptoms, how long they have been present, and how often they recur. For patients with chronic or recurrent sinusitis, allergy testing is often an important step. Identifying environmental triggers, like dust mites, mold, or pollen, can explain why sinus infections keep coming back and help guide a more effective treatment plan.

• Saline nasal rinses to flush the sinuses
• Decongestants and pain relievers for symptom relief
• Intranasal corticosteroids to reduce inflammation
• Antibiotics when bacterial infection is confirmed or strongly suspected
• Allergy testing to identify environmental triggers
• Personalized allergy treatment, including sublingual immunotherapy (allergy drops), to reduce the underlying immune response driving recurring inflammation
• Long-term intranasal corticosteroid therapy
• Referral for structural evaluation when appropriate