Most people start a hair treatment with hope. They track every strand, check the mirror twice a day, and wait for change. Then, somewhere around week three or four, the shedding seems to get worse. Naturally, the first instinct is panic — “This isn’t working. I’m losing more hair than before.”
Photo by Towfiqu barbhuiya
But what’s actually happening in those early weeks is far more interesting than a treatment failure.
What does the hair growth cycle have to do with this
Hair doesn’t grow in a straight line. Every strand on your scalp is in one of three phases: anagen (active growth), catagen (transition), or telogen (resting and shedding). At any given time, roughly 85–90% of your hair is growing, and about 10–15% is in the resting phase, waiting to fall.
The problem is that when something disrupts this cycle — stress, hormonal changes, nutritional deficiencies, or even the start of a new treatment — more hairs can shift into the telogen phase at once. The result is a temporary but noticeable increase in shedding. This is called telogen effluvium, and it’s one of the most misunderstood events in the entire hair loss journey.
Why treatments can trigger temporary shedding
This sounds counterintuitive, but it’s rooted in real biology. When a hair follicle that has been dormant or weak gets stimulated — by a topical, a supplement, or a medical treatment — it can push out the old, weakened hair to make room for a new, healthier strand.
Think of it like clearing old files before installing fresh software. The follicle essentially evicts the old hair so the new cycle can begin properly. This is especially common with treatments that increase blood flow to the scalp or directly influence follicle activity. The shedding phase is not a sign that hair is dying. It’s often a sign that the follicle is waking up.
This same phenomenon is well-documented with certain DHT-blocking medications. Many people researching finasteride shedding find that an initial increase in hair fall during the first few months is actually associated with better long-term outcomes, as the follicle resets and enters a healthier growth cycle.
How long does the shedding phase last
There’s no single answer, but for most people experiencing treatment-related shedding, the phase tends to last between four and twelve weeks. The timeline depends on:
- How long had the hair loss been progressing before treatment began
- The underlying cause (hormonal, nutritional, stress-related, or genetic)
- The type of treatment being used
- Overall scalp health and circulation
The key marker to watch isn’t just how much hair is falling — it’s whether new, fine hairs start appearing at the hairline or temples. Those tiny, light strands are a positive indicator that follicles are re-entering the anagen phase.
What makes this phase worse for some people
Not everyone experiences the same intensity of shedding. For some, it’s barely noticeable. For others, it’s alarming. A few factors tend to amplify the shedding phase:
- High levels of ongoing stress (which independently push more follicles into telogen)
- Iron deficiency or low ferritin levels, which the body requires to build new hair
- Poor scalp hygiene or buildup that blocks follicle activity
- Starting multiple interventions at the same time without addressing root causes
The last point matters more than most people realize. Layering treatments without understanding what’s actually causing the hair loss can prolong the adjustment period and make the shedding phase harder to interpret.
Addressing root causes instead of just symptoms
One of the more grounded approaches gaining attention is looking at hair loss from the inside out — examining hormonal balance, gut health, stress markers, and nutrient levels before deciding on a treatment path. Traya is one platform that takes this kind of diagnostic-first approach, combining medical, nutritional, and Ayurvedic inputs to understand what’s actually driving hair loss in each case.
This matters because the shedding phase looks the same on the surface, regardless of what’s causing it. But the underlying triggers are often very different.
Final thoughts
If your hair seems to be falling more after you’ve started a treatment, don’t assume the worst. The scalp is not a simple system, and progress rarely looks linear. What looks like a setback is often biology doing exactly what it should — clearing the old to bring in the new. Understanding the mechanism behind this phase doesn’t just reduce anxiety. It helps you stay consistent long enough to actually see results.