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Understanding the Hair Growth Cycle

Did you know that all of your hair follicles are fully developed at the fetal age of 22 weeks? One million of them are on your head. As you grow in age, the density of your scalp hair changes, which explains why your hair growth cycle can change over time. 

At Advanced Robotic Hair Restoration Centers in Hauppauge, New York, Dr. Mayer, Dr. Pollina, and the rest of our team have extensive experience in hair restoration. We understand how the hair growth cycle works and how to treat thinning hair, hair loss, female and male pattern baldness, and more.

Structures of hair follicles

Your hair follicle is a hollowed segment of the epidermis, extending down into the dermis. Its structure contains layers that operate differently. 

At the base, or the papilla, you have very small blood vessels that bring nourishment to your cells. The bulb, or the very bottom part of the that surrounds the base, divides every 23-72 hours. 

The inner and outer sheaths protect your growing shaft and help it form. Your inner sheath moves along your hair shaft, ending at the sebaceous gland. Your outer sheath moves up to the gland.

You have a muscle that attaches to a fibrous layer below the gland that’s around the outer sheath. As your muscle contracts, your hair begins to stand up, which causes your sebaceous gland to emit oil and produce sebum to condition and nourish your hair and skin.

As you age, you produce less sebum, which affects the cycle of hair growth.

Hair growth stages

The random number of hairs on your head exist in one of three stages:

Anagen

When your hair divides rapidly at the root, your hair is in the active phase called anagen. Your new hair begins to form and push up the follicle and then out. During this phase, your hair grows about one centimeter every 28 days. 

If you can’t seem to grow your hair long, it means you have a short, active growth phase. 

Catagen

During the catagen phase, your hair is in transition. Your hair growth stops and the root of your outer sheath shrinks and clings to the root of your hair, forming what’s known as a club hair.

Telogen

Telogen is the last phase where your hair rests for about 100 days. If you pull a hair out from your scalp, you can see the hard, white material at the root, which is the club hair that’s completely formed.

To learn more about the hair growth cycle or to schedule a consultation about your hair growth concerns, contact us at 631-215-3947 today, or book your appointment online. You can also send our team a message if you have any questions or concerns.

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