Hair Follicles: Function, Growth Cycle, Formation & Hair Removal

Learn what hair follicles are, how they work, how hair grows, the hair growth cycle, follicle formation, and common methods for managing unwanted hair. #how hair grows

HEALTH

12/12/20234 min read

Illustration showing hair follicles, hair growth, and the different stages

Hair Follicles: Function, Formation, Hair Growth, and Hair Removal Methods

Introduction

Have you ever wondered how your hair grows or what happens beneath the surface of your skin? Hair follicles are tiny, tube-shaped structures located within the skin that produce and support hair growth. They play an important role in determining hair thickness, texture, growth rate, and the overall hair growth cycle.

Understanding how hair follicles work and develop can help you make informed decisions about hair care, hair growth, and hair removal.

What Are Hair Follicles?

A hair follicle is a small structure in the skin from which a hair grows. Each follicle surrounds the hair root and extends into the deeper layers of the skin.

The main parts associated with hair growth include:

Hair root: The part of the hair located inside the follicle.
Hair shaft: The visible portion of hair that extends above the skin.
Hair bulb: The base of the follicle where new hair-producing cells are formed.
Sebaceous gland: A small gland connected to the follicle that produces sebum, an oily substance that helps moisturize the hair and skin.

Hair follicles continuously go through different stages of growth and rest, which determine how long individual hairs remain on the body.

How Do Hair Follicles Work?

Hair follicles are responsible for producing new hair. At the base of the follicle, specialized cells divide and multiply. As new cells are produced, older cells are pushed upward and become part of the growing hair shaft.

Blood vessels near the hair bulb provide oxygen and nutrients that support this process. The follicle also interacts with surrounding skin structures and hormones, which can influence hair growth.

The Role of Sebum

Sebaceous glands are attached to many hair follicles. These glands produce sebum, a natural oil that helps keep the skin and hair moisturized.

Sebum can help:

Reduce dryness
Protect the skin
Lubricate the hair
Maintain the skin's natural barrier

However, excessive sebum production can contribute to oily skin and may be associated with certain skin conditions.

Hair Follicle Formation

Hair follicles begin developing before birth during fetal development. The number and distribution of hair follicles are largely determined by genetics and remain relatively stable throughout a person's lifetime.

Although new follicles are generally not produced after birth, the activity of existing follicles can change because of factors such as:

Genetics
Age
Hormonal changes
Nutrition
Certain medications
Medical conditions

During puberty, hormonal changes can stimulate hair follicles in areas such as the face, underarms, chest, and pubic region. This results in the development of thicker and more noticeable hair in these areas.

Understanding the Hair Growth Cycle

Hair does not grow continuously at the same rate. Each follicle moves through a natural growth cycle consisting of several phases.

Anagen Phase

The anagen phase is the active growth stage. Cells in the hair follicle rapidly divide, allowing the hair shaft to grow. The length of this phase varies depending on the location of the hair and individual genetics.

Catagen Phase

The catagen phase is a short transitional period. Hair growth slows down, and the follicle begins to shrink.

Telogen Phase

The telogen phase is the resting stage. After this period, the old hair may eventually shed and the follicle can begin a new growth cycle.

Because individual follicles are at different stages of the cycle at any given time, normal hair shedding occurs throughout the day.

Factors That Can Affect Hair Growth

Hair growth can vary considerably from person to person. Several factors may influence the activity of hair follicles, including:

Genetics and family history
Age
Hormonal changes
Nutrition and overall health
Stress
Certain medications
Skin or scalp conditions
Hair-care practices

Changes in hair growth or unexpected hair loss can sometimes be associated with an underlying health condition. Persistent or sudden changes should be evaluated by a qualified healthcare professional.

Common Methods of Managing Unwanted Hair

Hair growth is a natural process, but some people choose to remove or reduce unwanted hair for personal, cosmetic, or cultural reasons. Several hair-removal methods are available.

1. Shaving

Shaving cuts hair at or near the surface of the skin. It is quick, inexpensive, and easy to perform at home.

However, because the follicle remains intact, hair typically becomes visible again relatively quickly.

Important: Shaving does not make hair grow back thicker, although newly cut hair can temporarily feel coarse because of its blunt tip.

2. Waxing

Waxing removes hair from the root by applying wax to the skin and pulling it away along with the hair.

It generally provides longer-lasting results than shaving because the hair must grow back from the follicle. However, waxing can cause temporary redness, irritation, or discomfort in some people.

3. Laser Hair Removal

Laser hair removal uses concentrated light energy to target hair follicles and reduce future hair growth. Multiple treatment sessions are usually required because hair follicles respond differently depending on their stage in the growth cycle.

Results can vary based on factors such as hair color, skin type, treatment area, and the technology used.

Laser hair removal should be performed by an appropriately trained professional.

4. Topical Treatments

Certain prescription topical treatments may slow hair growth in specific circumstances. These treatments work by affecting processes involved in hair growth rather than simply removing hair from the skin.

Because some topical treatments are prescription medicines, they should only be used under appropriate medical guidance.

When Should You See a Dermatologist?

Most variations in hair growth are normal. However, it is a good idea to consult a dermatologist if you experience:

Sudden or unexplained hair loss
Rapid changes in hair growth
Significant new facial or body hair
Patchy hair loss
Persistent scalp irritation or inflammation
Changes in hair accompanied by other unusual symptoms

A dermatologist can examine the skin and hair follicles and determine whether further evaluation or treatment is necessary.

Conclusion

Hair follicles are essential structures that produce hair and support the natural hair growth cycle. Their activity is influenced by genetics, hormones, age, and other factors. While the number of hair follicles is largely determined before birth, the rate and pattern of hair growth can change throughout life.

Whether you choose to maintain your natural hair or use methods such as shaving, waxing, laser hair removal, or medically recommended treatments, understanding how hair follicles work can help you make informed decisions about your hair and skin care.

If you notice sudden or unusual changes in hair growth or hair loss, consult a dermatologist or qualified healthcare professional for personalized advice.

About

Contact

Submit a story

MicroNews empowers the generation of tomorrow for a brighter future and hope for every individual.

Terms & Conditions

Thanks For Touch with us

We care about your data in our privacy policy.