Are there any good scalp care methods for hair loss?

Whenever the seasons change, my hair falls out literally like crazy. After washing my hair, the drain is packed with fallen hair.

Then, when you dry it with a hairdryer, a whole bunch falls out again, so if you pick them up and clump them together, you can make a ball of fur...

And my family tells me that my hair falls out frequently even when I walk around the house, and that the whole place is covered in it.

This phenomenon is more pronounced when the seasons change rapidly, and it seems to be even more of a tendency when it gets hot.

As a result, after the period of heavy shedding passes, the hair grows back over the course of the seasons, making it look slightly full for a very short time, but when the seasons change, it falls out in clumps again, leaving the hair thin. In areas where a lot of hair has fallen out, the grown-out hair is still short, so the overall length looks uneven.

My hair keeps falling out in a never-ending cycle—it grows a little, then falls out again—without ever having a chance to get thick, so I can't even dream of having full hair...

I've tried using commercially available hair loss shampoos and even taken biotin, which is said to be good for hair, but I didn't see any significant effects.

Could this possibly be due to heat? If so, how should I manage scalp heat?

Even if it's not heat management, is there a good way to manage it so it doesn't get lost easily in everyday life?