So I have this hair problem...

So hi! I know this may sound gross to some, but I have dandruff, it's not that extreme but (idk how to describe it but after I wash my hair my hair its clean, but after 1-2 days dandruff starts appearing, and my head gets itchy at times) I usually just wash it when that happens but then my parents complain about me washing my hair too often? (Since I take long showers and even longer showers when I wash my hair) I think I've had this issue for 5 years, and honestly I feel kinda ashamed to have to be asking for help, but I've been trying hard! any tips? Thanks in advance! 😙👌