How does it work?1 min read
What phases does a single hair go through?
Hair does not grow all the time. Each hair goes through a cycle with three phases, and this cycle explains why hair loss seems to show up late.
Author: Uzm. Dr. Oya Oylum Argun
Hair does not grow all the time. Each hair goes through a cycle with three phases, and this cycle explains why hair loss seems to show up late.
- Growth phase. The hair is actively growing; this is the longest phase. Most of the hairs on the scalp are normally in this phase.
- Transition phase. A short stage in between; growth stops and the follicle shrinks.
- Resting phase. The hair stays in place but is not fed. When its time is up, it falls out and a new hair comes up from beneath.
Stress, an illness or a change of season can push many hairs into the resting phase at the same time. But the shedding shows up not at that moment but months later. That is why people often cannot remember the cause.
This article is for general information and does not replace individual medical advice. The right approach for you is decided at the consultation.
Last updated: 4 September 2026
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