Why Does Stress Cause Accelerated Hair Loss?

Stress is acknowledged to accelerate MPB. My question is how much stress would it take to increase hair loss to a noteable degree. Would everyday stress, for example the stress in which everybody would at least arrive at in work or home cause an acceleration or when you mean stress do you mean a really long drawn out period of total stress. What is responsible in stress which causes acceleration in MPB, raised testosterone?

Medicine is a descriptive science, and the observations that stress contributes to hair loss is something we have observed. I do not believe everyday anxiety (being late for work, for example) is stressful enough to cause hair loss, but I also do not know how to calculate the degree of stress a person has in their lives. People tell me that they’ve noticed their hair falling out with divorce and other severe relationship or family problems, financial problems, and so on. These are the types of long, drawn out stresses that can cause hair loss. If you think about the saying “I’m pulling my hair out” that many people use when under pressure, that describes the stress people are talking about.