what causes sinusitis
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Overview Sinusitis is an inflammation of the sinuses. It is often caused by bacterial (germ) infection. Sometimes, viruses and fungi (molds) cause it. People with weak immune systems are more likely to develop bacterial or fungal sinus infection. Some people with allergies can have allergic fungal sinus infection. Acute sinus infection lasts three to eight weeks. A sinus infection lasting longer than eight weeks is considered chronic.
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- Fungi, Bacteria and viruses can be a cause of sinusitis. Any infection of the nasal passages that cause it to swell can affect the opening of the sinuses. If the ostium (opening) is blocked, air and mucus secretions collect and cause pressure on the sinus cavity walls. This can also cause our cilia (hair like cells responsible for the removal of mucus) not to work properly and is the main reason why we have pain during sinusitis.
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Sinus Pain Attack! Chronic sinusitis may be caused by allergies, abnormal sinus anatomy that leads to chronic blockage (polyps), or dental problems. Nasal Polyps Nasal polyps are an overgrowth of tissue within the sinuses that can block the flow of mucus and air.
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ENT Disorders Sinusitis is an inflammation or swelling of the tissue lining the sinuses. Healthy sinuses are filled with air. But when they become blocked and filled with fluid, germs can grow and cause an infection. Conditions that can cause sinus blockage include: The common cold; Allergic rhinitis, which is swelling of the lining of the nose; Small growths in the lining of the nose called nasal polyps; A deviated septum, which is a shift in the nasal cavity; Types
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Sinusitis Treatment Do I Have a Sinus Infection. A sinus infection is caused by inflammation of the para-nasal cavities caused by irritation of the mucous membrane. There are four pairs of nasal cavities. Inflammation, irritation and or infection can result in one or more nasal cavities.
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- Causes of Sinus infection without any prevalence information. The following causes of Sinus infection are ones for which we do not have any prevalence information. 1  Adenovirus-related Cold-sinus infection. 2  Allergic rhinitis. 3  Anterior ethmoidal nerve neuralgia. 4  Atrophic rhinitis. 5  Chronic sinusitis. 6  Cocaine abuse. 7  Common cold-sinus infection.
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- Although bacteria often colonize obstructed sinuses, bacterial infections are not the only cause of chronic sinusitis. Anatomy, allergies, polyps, immune deficiencies, and dental diseases may also cause chronic sinus problems.
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Sinusitis Sinusitis can occur from one of these conditions: 1  Small hairs (cilia) in the sinuses fail to properly to move mucus out. 2  Colds and allergies may cause too much mucus to be made or block the opening of the sinuses. 3  A deviated nasal septum, nasal bone spur, or nasal polyps may block the opening of the sinuses.
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Symptoms of Sinusitis Acute Sinusitis. Acute sinusitis is usually caused by a viral or bacterial infection. The common cold, which is caused by a virus, may lead to swelling of the sinuses, trapping air and mucus behind the narrowed sinus openings. Both the nasal and the sinus symptoms usually go away within two weeks.
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- Sinusitis starts as a result of blockage of the hole (actually a short hairpin shaped tube) into the sinuses, called an ostium. This blockage can occur as a result of an anatomical obstruction, swelling due to a cold or allergy, drying of the mucus, or a foreign body.
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Sinus Infection (Sinusitis) Inflammation of the air cavities within the passages of the nose (paranasal sinuses) is referred to as sinusitis. Sinusitis can be caused by infection, but can also be caused by allergy and irritation of the sinuses. Sinusitis is one of the more common conditions that can afflict people throughout their lives. Sinusitis commonly occurs when environmental pollens irritate the nasal passages, such as with hay fever.
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HOW COLDS TRIGGER SINUS PROBLEMS Colds are caused by a viral infection. This viral infection can cause nasal congestion, which in turn can lead to sinus congestion. Also, as part of the immune system response, mucus production increases. Now, not only are nasal passages blocked, but also mucus build-up is more rapid.
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Sinusitis - How to relieve sinus inflammation? Common causes of chronic sinusitis include: 1  Nasal polyps. These tissue growths can block the nasal passages or sinuses. 2  Deviated nasal septum. A crooked septum — the wall between the nostrils — may restrict or block sinus passages. 3  Other medical conditions.
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- Inflammation of the sinus cavity that lasts for more than three months is chronic sinusitis. Although bacteria often colonize obstructed sinuses, bacterial infections are not the only cause of chronic sinusitis. Anatomy, allergies, polyps, immune deficiencies, and dental diseases may also cause chronic sinus problems.
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- For many years, antibiotics have been used excessively to treat Sinusitis. The main causes of Sinusitis are viral infections, allergies or irritants. A small percentage of infections are actually caused by bacteria, which antibiotics (if used correctly) can treat.
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Signs and Symptoms Sinus headaches can be caused by sinus congestion and inflammation, called sinusitis. Sinusitis, in turn, is caused by either a respiratory infection, such as a cold or flu, or allergies, like hay fever. Healthy sinuses allow mucus to drain and air to circulate throughout the nasal passages.
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- Allergic sinusitis is caused by environmental agents such as pollen, dust and mold, causing upper-respiratory signs or nasal congestion, facial tenderness, mucus in the throat, nosebleeds and nasal polyps. Allergic sinusitis is treated with nasal and throat sprays, decongestants and oral antihistamines.
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- Most often, acute sinusitis is caused by a virus (known as acute viral sinusitis) or bacteria (acute bacterial sinusitis). This is why the terms sinusitis and  sinus infection  are used interchangeably. About 98 percent of acute sinusitis cases are caused by a virus.
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- A sinus infection, which is also known as sinusitis, occurs when the normally air-filled sinus cavities becomes inflamed in a way that prevents the normal passage of mucus, according to MedlinePlus. The inflammation can be caused by a fungus, bacteria or virus.
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- Acute sinusitis is usually caused by a viral or bacterial infection. The common cold, which is caused by a virus, may lead to swelling of the sinuses, trapping air and mucus behind the narrowed sinus openings. Both the nasal and the sinus symptoms usually go away within two weeks.
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sinusitis Sinusitis is the inflammation of the sinuses caused by a bacterial infection. Sometimes diagnosis may be problematic because the symptoms often mimic those of the common cold. Sinusitis is usually treated with antibiotics.
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- Causes of Sinus Infection Knowing the causes of sinus infection is beneficial to the patient and the layman for prevention of recurrent sinus infections! The most common cause of a sinus infection is the common cold, viral influenza and hay fever. The cold causes inflammation in the nasal passages and this inhibits the drainage of the sinuses which can cause them to become inflamed.
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Sinusitis - Topic Overview The same viruses that cause the common cold cause most cases of sinusitis. When the lining of the sinus cavities gets inflamed from a viral infection like a cold, it swells. This is viral sinusitis. The swelling can block the normal drainage of fluid from the sinuses into the nose and throat.
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- 1 You may get acute sinusitis after having a cold. Acute sinusitis due to a viral infection will usually improve within 7-14 days.  Allergies are the most common cause of chronic sinusitis. You may also be more susceptible to chronic sinusitis if you have asthma, nasal polyps, or if you smoke.