Hi. Thanks for your query. Noted the history about your Dad having head spin last night, got better, went to sleep, felt little acidity on getting up, went to a Doctor who said the blood pressure was fine hence the head spin would have been due to acidity... You are correct, acidity giving head-spin is possible but the basic problem lies in the fact that what exactly your Father felt in head spin. There are three types of the problem one gets: - Blackening in front of eye is felt as head-spin. - Feeling of self rotation. - Feeling that the surrounding is moving. If any of these was the problems, the most probable causes are many. - Vascular, as the age advances the vertebral and/or carotid artery supply is hampered causing vertigo. - Viral infections can cause same problems. -Cervical sponditilits is a well known cause. I would advise him the following: Keep under observation what exactly is the feeling. Get started with a PPI like Omeprazole since acidity is present. If there is true vertigo that re-appears get an opinion and proper clinical evaluation by a Neurologist and invested accordingly like neck color doppler, MRI of the mastoids and brain as the case may be . Get started on medication for head-spin if required. If the problem settles without any medications, plain observation is needed and he should avoid going alone, no driving for a few days.