We hear this all the time in the clinic. Someone comes in, visibly shaken, holding a clump of hair they found in the shower drain. “I’ve been under so much stress lately,” they say. “Could that actually be doing this?”
The answer is yes. And the explanation is both more specific and more reassuring than most people expect.
Let’s talk about what’s really happening.
The Condition Has a Name: Telogen Effluvium
Telogen effluvium (TE) is one of the most common forms of hair loss, and also one of the most misunderstood. It shows up as widespread shedding across your entire scalp rather than in patches or along a specific hairline. The part that catches most people off guard is the timing. It typically begins two to three months after whatever triggered it. So by the time your hair starts falling out, the stressful event may already feel like old news.
According to NIH StatPearls, telogen effluvium happens when your body experiences significant stress and responds by pushing a large number of hair follicles out of the active growing phase and into a resting phase early. After sitting in that resting phase for about three months, those hairs shed all at once. That’s the sudden wave of shedding that brings so many people through our doors.
Your Hair Has a Growth Cycle
Here’s something most people never learn: every single hair on your head is on its own schedule, cycling through three phases continuously.
The growing phase lasts two to seven years. The transitional phase lasts a couple of weeks. The resting phase lasts about three months, after which the hair naturally sheds and the follicle starts fresh.
Under normal conditions, about 85 to 90 percent of your hair is actively growing at any point in time. When stress intervenes and throws a large group of follicles into the resting phase at the same time, you end up with far more shedding than usual all at once. That’s the shift from everyday hair loss to something that feels alarming.
