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Types of IH

There are different types of IH, which differ in causes, severity and treatment.

Chronic IIH
Severe IIH
Secondary Intracranial Hypertension
Acute IH

Spontaneous Intracranial Hypotension


Chronic IIH
Most patients who have Chronic IIH have their symptoms managed by medication to control cerebral spinal fluid (CSF) levels, and also have occasional lumbar punctures if necessary. Losing weight can help lead into remission, if weight is a factor. There is no particular known cause.

Severe IIH

When IIH becomes severe, the symptoms have become harder to manage by medication and lumbar puncture. Vision will be decreasing rapidly and a surgical intervention will be necessary to control the CSF levels, reduce optic swelling and prevent visual loss.

Secondary IH
This form of intracranial hypertension is usually caused by a known cause. Some medications are known to cause SIH such as a group of antibiotics called Tetracyclines, the Oral contraceptive pill, Vitamin A and Progesterone. There are also other diseases known as Systemic diseases, which are diseases that affect a number of organs, tissues or the whole body.

Acute IH

This form of intracranial hypertension usually occurs with a severe head injury, an intracranial bleed from a stroke or aneurysm. Raised intracranial pressure is triggered rapidly and can be fatal if undetected and treated. The high pressure can be caused by either the brain swelling or bleeding in or around the brain.

Spontaneous Hypotension (SIH) also known as Craniospinal Hypotension)

Spontaneous Intracranial Hypotension is caused by leakage of cerebrospinal fluid into the spinal canal, which result in a low pressure headache. It comes under the definition of a Postural Headache because it's eased when laying down but is worse when upright.

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