During What Season Does Human Hair Grow the Fastest?

Hair Growth Speed
Hair Growth in the Summer
Other Changes in the Summer
Hair Growth Cycles
More About Hair Growth Cycles

Written by Kath Bee

18 December, 2018

We have hair all over our bodies. Hair grows from the root, which is under the skin and is the only part of the hair that is alive. The rest of the hair is made up of dead protein cells.

Hair Growth Speed

Hair growth rate is genetically determined, and varies from person to person. It also grows more slowly with age, and is affected by both internal states and environmental conditions.

Hair Growth in the Summer

How Long Does it Take for Hair to Grow?

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Hormones released in the body during the summer season can increase the rate of growth. However, the increase in growth rate is so small that it is likely to go unnoticed.

Other Changes in the Summer

Researchers report that while hair grows, hair shedding also increases in spring and summer. By fall, a person may lose as many as 100 hairs per day. This shedding may also affect hair growth, and varies from person to person.

Research suggests that hair shedding is related to daylight, and that reducing exposure to sunlight may help prevent seasonal hair shedding.

Researchers report that while hair grows, hair shedding also increases in spring and summer.
This shedding may also affect hair growth, and varies from person to person.

Hair Growth Cycles

On What Part of the Body Does Hair Grow the Fastest on a Normal Man's Body?

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It sometimes seems as if your hair is growing fast. Just two weeks after a haircut, you may notice the need for a trim. Then, suddenly, the growth seems to slow down or stop; you go many weeks in a row during which your hair seems to stay exactly the same length. What's happening here?

Not only does hair grow faster in the summer, but it goes through cycles of growth and rest all year long 2. Each complete cycle typically lasts several weeks.

It sometimes seems as if your hair is growing fast.
Then, suddenly, the growth seems to slow down or stop; you go many weeks in a row during which your hair seems to stay exactly the same length.

More About Hair Growth Cycles

There are three stages of hair growth: anagen, which is the active growth phase; catagen, a transitional stage; and telogen, a resting phase 2. Three percent of hair is in the catagen stage at any time. During the anagen growth phase, hair typically grows about one centimeter per month.

The active growth phase is called anagen. The transitional stage is called catagen. The resting phase is called telogen.

There are three stages of hair growth: anagen, which is the active growth phase; catagen, a transitional stage; and telogen, a resting phase 2.
The transitional stage is called catagen.