Low blood pressure is quite subjective and it depends on signs and symptoms to categorize someone as having
symptomatic low blood pressure. However 84/48 is surely low blood pressure as generally anything less than
90/60 is considered to be so. You need to visit your doctor at the earliest if you have not done so as yet.
Low blood pressure can lead to dizzy spells, blackouts and insufficient blood flow to important organs such as
brain, heart or kidneys. Hope this helps. Please do visit your doctor and take care.