Most of the time, vasodilation causes no noticeable or unpleasant effects. The widening of the blood vessels means blood pressure falls in these vessels. In some cases, this results in a widespread drop in blood pressure — hypotension — which can lead to several symptoms. An individual may experience nausea, dizziness, or blurred vision, sometimes followed by confusion and unsteadiness. The person may feel faint and need to sit or lie down to relieve the symptoms.

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