Neurological Symptoms
The majority of neurological symptoms of anaphylaxis are a result of impaired blood flow to the brain. This can manifest itself as:
Syncope is the sudden and transient loss of consciousness or passing out. Approximately 13% of patients with anaphylaxis report loss of consciousness or syncope. As stated previously, the increased volume of fluid leaving the vessels as a result of increased permeability and the concomitant vasodilation result in a decrease in blood pressure. Gravity can cause the blood to collect in the lower regions of the body. Therefore, standing causes blood to collect in the legs and compromises the blood supply to the brain. Within seconds, the episode of syncope begins.
Another symptom with a comparable underlying cause is dizziness. The patient may experience blurriness and a whirling environment.
Headache is also associated with respiratory or cardiovascular abnormalities.
The initial phase of anaphylaxis is accompanied by confusion and mental clouding. The patient may be incapable of comprehending the environment. Assessing the degree of abrupt loss of control over voluntary functions may also be challenging. Incoherence of thought is one of the neurological symptoms of anaphylaxis.
