Emotional stress is less likely to cause hair loss than physical stress, but it can happen, for instance, in the case of divorce, after the death of a loved one, or while caring for an aging parent. More often, though, emotional stress won't actually precipitate the hair loss.
The Tree of Life is a universal symbol found in many spiritual and mythological traditions around the world. In various cultures it is known as the Cosmic Tree, the World Tree and the Holy Tree. The Tree of Life symbolizes many things, including wisdom, protection, strength, bounty, beauty, and redemption. This wise and holy Tree is like the Creator as it sustains creation with its abundant fruit, protection and generativity.
This, I suspect, was what the original, the real Tree of Life in the Garden of Eden symbolised. It was material, yet it stood for the blessing of eternal life which God would give to Adam and Eve, and their descendants, if they were to pass the test of obedience. Now, use a little lateral thinking.