I'm going to throw another "theory" out there. I believe that conditioner on the scalp, with or without massage, tends to open the hair follicle allowing it to release the hair. It took a year for me to learn than I cannot conditioner wash either. I noticed that my hair was falling out at the root - not breaking off. Any comments on my crazy theory??
Originally Posted by cristi05
Actually I found this which is somewhat close to your theory. This poster basically realized that conditioner-washing was softening the roots too much, thus leading to excessive shedding during the cleansing and detangling process.

This might sound like me. The roots of my hair were particularly soft and smooth (which I liked at the time).

As long as it grows back, that's all I care about now!

Excessive Shedding: Could Co-Washing Be the Culprit? | hairscapades