I would like to ask lying head is not dizzy, stand up dizzy is how to return a responsibility

Lying down without fainting, standing up with fainting is usually considered to be the cause of orthostatic hypotension, often accompanied by blurred vision, nausea, palpitations and other manifestations. In addition, it may also be caused by cervical spondylosis, which is related to cervical degenerative diseases, long-term improper posture, trauma and other factors.