Standing without dizziness but lying down with dizziness may be related to postural changes and intracranial pressure changes, mostly related to cerebrovascular disease, meningitis or cervical spine problems. You can do head CT, cervical spine CT and MRI of head and neck to choose a reasonable treatment method for the cause. It may also be related to benign positional vertigo, and may be related to bad habits, frequent emotional excitement, anger, irritability, staying up late, excessive fatigue, and drinking a lot of alcohol. It is important to maintain a good diet and rest habits, and do more aerobic exercises. Stand not dizzy, lying will be dizzy, but also may be related to high blood pressure or cervical spine disease, Meniere’s syndrome, etc. If the blood pressure is high, you can take Benadryl and other antihypertensive drugs. Cervical spine diseases can be treated with traction, acupuncture, massage, etc.