Is it the liquid drying on my scalp and peeling itself off? Or is it dandruff?

Greetings, I'm 19 years old and I've started using minoxidil for about a month now.. And I've been using it only once a day but I've been noticing something unusual, it's that I have been gaining dandruff-like flakes on my head after itching or after styling my hair the right way when I'm in public, and I'm not sure whether it's from over showering my hair everyday (after used minoxidil every night) in the morning, or its from the medicine itself that's causing this to happen, pls help!