Introduction The skull contains a number of air-filled spaces called sinuses . They perform the following functions: Reduce the weight of the skull Provide insulation for the skull Provide resonance for the voice Four pairs of sinuses, known as the paranasal air sinuses , connect to the nasal passages (the two airways running through the nose): Frontal sinuses (behind the forehead) Maxillary sinuses (behind the cheekbones) Ethmoid sinuses (between the eyes) Sphenoid sinuses (behind the eyes) Sinusitis occurs in these four areas. Sinusitis Healthy sinuses are sterile and contain no bacteria. (The nasal passage, on the other hand, normally contains many bacteria.) The Disease Process. Sinusitis is an infection that occurs if obstruction or congestion leads to bacterial growth in the paranasal sinuses. Among the many causes of such obstruction or congestion are the common cold, allergies, certain medical conditions, abnormalities in the nasal passage, and change in atmosphere. In any of these cases, si...
Cavernous sinus thrombosis is a blood clot in the cavernous sinus. The cavernous sinus is a cavity at the base of the brain that contains a vein, several nerves, and other structures. The vein carries deoxygenated blood from the brain and face back to the heart.
The vein and cavity run between the large bone at the base of the skull (sphenoid bone) and temporal bone (near the temple).
Causes, incidence, and risk factors
The cause of cavernous sinus thrombosis is usually a bacterial infection that has spread from the sinuses, teeth, ears, eyes, nose, or skin of the face. Persons with conditions that cause an increased risk of blood clots may also develop cavernous sinus thrombosis.
Did you know that nearly 90% of what people think are sinus headaches are actually Migraines? These are some of the symptoms that make people think they have a sinus headache:
runny nose or nasal congestion
red or puffy eyes
facial pain or pressure
All of those can be Migraine symptoms. A Migraine can inflame the trigeminal nerve. The trigeminal nerve has branches in the face, One runs above they eyes, one runs along the sinuses, and the third runs along the lower jaw. As a result, the pain may be felt near the sinuses, which are air pockets between bone in the lower forehead, cheeks and behind the nose. You can see a diagram of this in Pathways of Migraine . Sinus headaches rarely occur unless you have a sinus infection
For more information, see:
Sinuses Giving You a Headache? It's Probably Migraine.
See how much you know about types of and Migraines / headaches in our quiz:
Identify the Type of Migraine or Headache .
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