I am experiencing low blood pressure (hypotension). i'm 23 yr old male. bp is 90/52 is this dangerous. just very tired. ?

Low BP: Mild cases of symptomatic low BP can often be treated by drinking more fluid and in some cases eating more salt. More severe cases need other testing and treatments. To get to the bottom of these symptoms a physician would want a detailed history and maybe some basic tests.

Depends: Low blood pressure and whether it will affect you depends on your body habitus, nutritional status, medications, how fit you are, etc. If you have symptoms of headaches, dizziness, fatigue then discuss this with your doctor. Get blood tests and a physical exam. That blood pressure in your age is not necessarily dangerous if you're asymptomatic. There are several reasons for being tired too.