When I wash my hair, too much hair falls out.

These days, every time I wash my hair, the drain is freaking out.

It's said that the amount in the photo is basically the same, but now it's 2-3 times more than that.
I definitely feel like the amount I'm losing has increased compared to before.
Is it due to seasonal influence?
Or I'm confused if it's an early sign of hair loss.
Should I go to a dermatologist in this case?
I'm wondering if I should start by checking my lifestyle habits.
I also want to know if supplements or shampoos actually help.