(Concern) About hair loss

These days, I am deeply worried about hair loss...

The front and back are okay, but the crown is starting to thin a little..ㅠㅠ Even after washing my hair and coming out, I tend to bend over.

It's visible enough to be reflected in a mirror... This must be serious, right?.. But I don't want to take medicine.

Are there no other treatment options?

I need advice from the teachers.