Welcome to healthcare magic!
The kind of hair fall
you are suffering is Male Pattern Baldness
and is very difficult to treat.
You should avoid hard shampooing, if you have dandruff then you need to care for it- consult a local dermatologist
He may consider anti-dandruff treatment and otherwise a topical medicine minoxidil
is also effective in many patients. Please try them in supervision of your physician.
I hope this advise would be helpful for you.
Still if you have any queries or doubts, please write me back,
I would be happy to solve them.
Wish you a great health!