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Causes of Sinusitis

List of causes of Sinusitis

Following is a list of causes or underlying conditions (see also Misdiagnosis of underlying causes of Sinusitis) that could possibly cause Sinusitis includes:

More causes:see full list of causes for Sinusitis

Causes of Sinusitis (Diseases Database):

The follow list shows some of the possible medical causes of Sinusitis that are listed by the Diseases Database:

Source: Diseases Database

Sinusitis: Related Medical Conditions

To research the causes of Sinusitis, consider researching the causes of these these diseases that may be similar, or associated with Sinusitis:

Sinusitis: Causes and Types

Causes of Types of Sinusitis: Review the cause informationfor the various types of Sinusitis:

  • Acute Sinusitis - lasts less than 3 weeks
  • Chronic Recurrent - longer than 3 weeks
  • Recurrent Recurrent - repeated bouts
  • Frontal sinus infection
  • Maxillary sinus infection
  • more types...»

Causes of Broader Categories of Sinusitis: Review the causal information about the various more general categories of medical conditions:

Sinusitis as a complication of other conditions:

Other conditions that might have Sinusitis as a complication may, potentially, be an underlying cause of Sinusitis. Our database lists the following as having Sinusitis as a complication of that condition:

Sinusitis as a symptom:

Conditions listing Sinusitis as a symptom may also be potential underlying causes of Sinusitis. Our database lists the following as having Sinusitis as a symptom of that condition:

Medications or substances causing Sinusitis:

The following drugs, medications, substances or toxins are some of the possible causes of Sinusitis as a symptom. This list is incomplete and various other drugs or substances may cause your symptoms. Always advise your doctor of any medications or treatments you are using, including prescription, over-the-counter, supplements, herbal or alternative treatments.

What causes Sinusitis?

Causes: Sinusitis: Can be bacterial or fungal infections.
Article excerpts about the causes of Sinusitis:

Sinusitis, NIAID Fact Sheet: NIAID (Excerpt)

Most cases of acute sinusitis start with a common cold, which is caused by a virus. These viral colds do not cause symptoms of sinusitis, but they do inflame the sinuses. Both the cold and the sinus inflammation usually go away without treatment in 2 weeks. The inflammation, however, might explain why having a cold increases your likelihood of developing acute sinusitis. For example, your nose reacts to an invasion by viruses that cause infections such as the common cold or flu by producing mucus and sending white blood cells to the lining of the nose, which congest and swell the nasal passages.

When this swelling involves the adjacent mucous membranes of your sinuses, air and mucus are trapped behind the narrowed openings of the sinuses. When your sinus openings become too narrow, mucus cannot drain properly. This increase in mucus sets up prime conditions for bacteria to multiply.

Most healthy people harbor bacteria, such as Streptococcus pneumoniae and Haemophilus influenzae, in their upper respiratory tracts with no problems until the body's defenses are weakened or drainage from the sinuses is blocked by a cold or other viral infection. Thus, bacteria that may have been living harmlessly in your nose or throat can multiply and invade your sinuses, causing an acute sinus infection.

Sometimes, fungal infections can cause acute sinusitis. Although fungi are abundant in the environment, they usually are harmless to healthy people, indicating that the human body has a natural resistance to them. Fungi, such as Aspergillus, can cause serious illness in people whose immune systems are not functioning properly. Some people with fungal sinusitis have an allergic-type reaction to the fungi.

Chronic inflammation of the nasal passages also can lead to sinusitis. If you have allergic rhinitis or hay fever, you can develop episodes of acute sinusitis. Vasomotor rhinitis, caused by humidity, cold air, alcohol, perfumes, and other environmental conditions, also may be complicated by sinus infections.

Acute sinusitis is much more common in some people than in the general population. For example, sinusitis occurs more often in people who have reduced immune function (such as those with immune deficiency diseases or HIV infection) and with abnormality of mucus secretion or mucus movement (such as those with cystic fibrosis). (Source: excerpt from Sinusitis, NIAID Fact Sheet: NIAID)

Sinusitis, NIAID Fact Sheet: NIAID (Excerpt)

If you have asthma, an allergic disease, you may have frequent episodes of chronic sinusitis.

If you are allergic to airborne allergens, such as dust, mold, and pollen, which trigger allergic rhinitis, you may develop chronic sinusitis. In addition, people who are allergic to fungi can develop a condition called "allergic fungal sinusitis."

If you are subject to getting chronic sinusitis, damp weather, especially in northern temperate climates, or pollutants in the air and in buildings also can affect you.

Like acute sinusitis, you might develop chronic sinusitis if you have an immune deficiency disease or an abnormality in the way mucus moves through and from your respiratory system (e.g., immune deficiency, HIV infection, and cystic fibrosis). In addition, if you have severe asthma, nasal polyps (small growths in the nose), or a severe asthmatic response to aspirin and aspirin-like medicines such as ibuprofen, you might have chronic sinusitis often. (Source: excerpt from Sinusitis, NIAID Fact Sheet: NIAID)

Medical news summaries relating to Sinusitis:

The following medical news items are relevant to causes of Sinusitis:

Related information on causes of Sinusitis:

As with all medical conditions, there may be many causal factors. Further relevant information on causes of Sinusitis may be found in:


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