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Sinusitis is an
inflammation of the paranasal
sinuses. It can be due to
viral, bacterial, or fungal
organisms. Sinusitis can also be the result of
allergies to certain environmental
factors. Sinusitis often follows an
upper respiratory infection (cold, pharyngitis). Chronic sinusitis is more likely due
to secondary infection in a person
with long standing allergies.
The paranasal sinuses
(maxillary, frontal, ethmoid,
sphenoid) are normally sterile.
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However if the nasal
mucosa becomes edematous (fills with
fluid) from allergies, a cold, hay
fever, etc., then the pathogens have
a place to grow.
The environment in the
sinuses becomes moist and warm,
propagating growth of viruses,
bacteria, and fungus. The
overgrowth of organisms results in
immune cells migrating to the
tissue. This extra cell material
and edema in the nasal mucosa
results in a plug. This is the
most common
cause of sinusitis symptoms. [1]
Sinusitis
affects men and women equally. It is
present in all social, racial, and
ethical classes. It is,
however, more likely
to develop in an individual with
allergies. Persons with diabetes and immunocompromise (e.g. cancer, HIV/AIDS)
are more likely to have an extreme
sinus infection with less well-known
organisms that can develop serous
complications.
The signs and symptoms of sinusitis are pretty
general. The area over the affected
sinus may be swollen, tender to the
touch, and warm. Pain is often a
symptom described as a headache or
toothache. Most persons with
sinusitis will complain of an
increase in pressure, and can point
to the sinus that is involved. There can be increased discharge
from the nose. The discharge is
usually green or yellow and can be
very thick and sometimes have a
rotten smell.
Specific
symptoms of inflammation in the
maxillary sinus include; pain in the
maxillary area (under the cheek
bones, next to the nose), toothache,
and frontal headache. Frontal
sinusitis presents with frontal
headache and pain in the frontal
area (on the forehead in between the
eyes). An infection in the ethmoid sinus causes pain behind and between
the eyes and a headache, often
described as "splitting." The sphenoid sinusitis presents with localized
pain and tenderness that can be in
the frontal area or in the occipital
area (back of the head).
Systemic
symptoms such as muscle aches, joint
pain, fever, chills, and fatigue can
be present in cases of sinusitis,
but can often be a sign that the
inflammation has moved beyond the
sinus into other structures. [2]
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There are
approximately 29.2 million cases of
sinusitis diagnosed each year, which
is approximately 14% of the population.
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It is estimated that
there are as many as 50 million
people living in the US with chronic
sinusitis.
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Sinus infections
account for more than 14 million
doctor visits each year. [3]
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