What you are seeing in October was set in motion in July.
Every strand moves through a cycle. A long growing phase, a short resting phase, then release. Most of the time this happens quietly, around a hundred strands a day, spread out enough that you never notice.
Autumn is the exception. It is the most widely observed shed of the year. Through summer, a larger group of strands slips into the resting phase together, and weeks later they let go together too. What you are seeing in October was set in motion in July.
Summer leaves its marks as well. Sun, salt, chlorine and heat all reach the hair before autumn does. Then the air dries out and the heating comes on, and the scalp has to adjust all over again.







