LOCATION AND SYMPTOMS
A headache caused by low cerebrospinal fluid volume / pressure in the head. Typically, the headache is located at the base of the back of the head, often with neck pain. However, it may be at the front, whole head or to one side. The headache is generally worse shortly after sitting up or standing and improves relatively quickly when laying down, hence it is often referred to as an “orthostatic” or “postural” headache. The pain can range from mild to severe and can feel more like pressure than pain and be accompanied by a heaviness. The headache may not be present (or may be mild) upon awakening and develop in the late morning or afternoon, generally worsening throughout the day.
Other common symptoms which may accompany the headache include nausea and vomiting, neck pain and stiffness, changes in hearing (muffled, underwater), tinnitus, sense of imbalance, sensitivity to light or sound, interscapular pain, brain fog, dizziness or vertigo.
Spontaneous intracranial hypotension is secondary to a cerebrospinal fluid (CSF) leak at the level of the spine and results in a loss of CSF volume to support the brain and spinal cord.