Medically the evaluation by Cynthia Cobb, DNP, APRN, WHNP-BC, FAANP — created by Amanda Barrell on October 23, 2019

On average, hair tends to grow in between 0.5 and 1.7 centimeters every month. This is indistinguishable to about 0.2 come 0.7 inches.

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This estimate originates from The Trichological Society. However, too many of different factors influence the speed of hair growth.

Males, for example, may uncover that their hair grows faster than that of females. Various other things that affect the speed of hair growth encompass genetics, age, health, and also pregnancy.

Bone marrow, which is the soft substance current inside the bones, is the only part of the body the grows much faster than hair.

The lips, palms that the hands, and also soles of the feet room the only parts of the human body on which hair does no grow. The main purpose the hair is to protect the body and keep it warm.

Keep reading for more information on just how hair grows and also the various factors that influence the speed of that growth.

Stages the hair growth

Share top top PinterestA human being has roughly 100,000 hair follicles on your scalp.
People room born with about 5 million hair follicles. This are small pockets in the skin the hair grows the end of.

Around 100,000 of this follicles space on the scalp. Human being with oval shaped follicles have an extremely curly hair, while those v round follicles have actually straight hair.

The stages of hair expansion are as follows:

Each follicle has a hair root, i m sorry is do of cell of protein.As blood circulates about the body, it delivers oxygen and also nutrients come the protein cells, which they need to multiply.As the protein cell multiply, they construct hair, i beg your pardon pushes up with the skin.As the hair grows out of the skin, it passes an oil gland. This lubricates the hair with the oil it requirements to remain soft and also shiny.By the moment the hair is long enough to come v the skin, that is dead. As a brand-new hair grow underneath, that pushes the dead hair the end of the skin. The hair then falls out or is shed.

Not every hair follicles room in action at the very same time. Follicles on the scalp, for example, will grow hair because that a few years before becoming inactive because that a period. This inactive part of the hair expansion cycle is dubbed telogen.

People lose roughly 50–100 hair from your body every job as part of the regular hair expansion cycle.

Factors that influence hair growth

Everyone’s hair is different, and lots of components can affect how easily it grows.

These include:

Genetics: A who genes will dictate how quickly their hair will grow.Sex: male hair grows much faster than mrs hair.

Telogen effluvium occurs when stress prompts the hair roots to go into the telogen phase of the hair cycle also early. It deserve to mean the as plenty of as 70% the scalp hairs autumn out within about 2 months.

People experiencing telogen effluvium often discover that their hair comes the end in handfuls. The is usually many noticeable ~ above the scalp yet can affect any part of the body.

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Common causes of telogen effluvium include:

childbirthsevere infectionsevere illnesssurgeryoveractive or underactive thyroid glandnot eating sufficient protein

Several medications can additionally cause telogen effluvium. These include:

retinoidsnonsteroidal anti-inflammatory drugs such as ibuprofen

Telogen effluvium will certainly usually resolve on that own when a person has actually sought treatment for the cause. Follow to the American Osteopathic college of Dermatology, the lot of shedding tends to decrease over a duration of about 6–8 months.