Hair Shedding: Understanding What's Normal and When to Seek Advice

Quick answer: Hair shedding is a natural part of the hair growth cycle, involving the daily release of old, resting hairs from the scalp. It's normal to shed approximately 50 to 100 hairs per day. While this process is continuous and essential for healthy hair renewal, changes in shedding patterns can sometimes indicate underlying issues, which distinguishes it from hair loss where hair follicles stop producing hair entirely.

Key takeaways

• Hair shedding is a normal biological process, part of the hair growth cycle, where hairs naturally fall out.
• On average, most people shed between 50 to 100 hairs daily; this is not hair loss.
• Excessive hair shedding, known as telogen effluvium, is often temporary and triggered by significant physiological or psychological stressors.
• Hair shedding is distinct from hair loss conditions like androgenetic alopecia or alopecia areata, where hair production slows or stops.
• Observing the appearance of shed hairs and overall hair density helps distinguish normal shedding from more concerning issues.
• If you notice a sudden, significant increase in the amount of hair you're shedding, professional medical advice can help identify the cause.

Hair Shedding: what the evidence shows

Hair shedding is a natural and continuous process, essential for maintaining healthy hair on the scalp. It is the final stage of the hair growth cycle, known as the exogen phase, where old hairs are released from their follicles to allow new hairs to begin growing. This cycle ensures a constant turnover and renewal of hair.

The hair growth cycle and shedding

Human hair growth occurs in a cyclical pattern, not a continuous one. This cycle typically has three main phases, followed by the shedding phase:

• Anagen (Growth Phase): This is the longest phase, lasting from 2 to 7 years. During anagen, hair actively grows from the follicle. At any given time, approximately 85 to 90% of the hairs on your scalp are in this phase. The duration of your anagen phase largely determines the maximum length your hair can achieve.
• Catagen (Transition Phase): A short transitional phase lasting about 2 to 3 weeks. Hair growth stops, and the hair follicle shrinks, detaching from the dermal papilla that supplies its nutrients. Only about 1 to 2% of hairs are in catagen.
• Telogen (Resting Phase): This phase lasts for approximately 2 to 4 months. The hair follicle is dormant, and the hair is fully formed but inactive, held in place. Around 10 to 15% of scalp hairs are in the telogen phase. Towards the end of this phase, the hair is ready to be shed.
• Exogen (Shedding Phase): This is when the old telogen hair is released from the follicle. This is the act of hair shedding, making way for a new anagen hair to begin its growth cycle in the same follicle. It's normal for this process to result in shedding 50 to 100 hairs daily. These shed hairs typically have a small, white bulb at the root, which is the dried keratinised tissue of the old hair shaft.

This continuous cycle means that while some hairs are growing, others are resting, and some are being shed. The balance between these phases maintains overall hair density.

Normal versus excessive Hair Shedding

Distinguishing between normal daily hair shedding and excessive shedding (known medically as telogen effluvium) is crucial. Normal shedding is part of healthy hair renewal, while excessive shedding can signal an underlying health issue or stressor.

Signs of normal shedding

• Quantity: It is normal to shed between 50 to 100 hairs per day. This number can vary slightly due to genetics, hair density, grooming habits, and even seasonal changes. For example, some studies suggest a slight increase in shedding during autumn.
• Appearance of Shed Hairs: Hairs shed normally will typically have a small, white bulb at the root end. This bulb is the club hair, indicating the hair completed its resting phase and was naturally pushed out by new growth.
• Distribution: Normal shedding is generally diffuse across the entire scalp. You won't typically see noticeable patches of thinning or balding.
• Hair Density: Despite the daily shedding, overall hair density remains stable over time because new hairs are constantly growing to replace those that are shed.

Signs of excessive shedding (telogen effluvium)

Telogen effluvium is a common form of temporary hair loss characterised by a sudden, significant increase in daily hair shedding. Instead of the usual 50 to 100 hairs, individuals may shed 200, 300, or even more hairs daily.

Common triggers for telogen effluvium include:

• Physiological Stress: Major surgery, severe illness (e.g., high fever, serious infection, COVID-19), significant weight loss, or chronic illness can push a large number of hairs prematurely into the telogen phase.
• Hormonal Changes: Childbirth is a very common trigger, leading to what is known as postpartum telogen effluvium, often occurring 2 to 4 months after delivery. Thyroid disorders (both overactive and underactive thyroid) can also cause shedding.
• Nutritional Deficiencies: Insufficient intake of essential nutrients such as iron, zinc, vitamin D, and biotin can disrupt the hair cycle and lead to increased shedding. Severe protein restriction can also be a factor.
• Medications: Certain medications, including anticoagulants, antiepileptics, some blood pressure medications, and antidepressants, can list hair shedding as a side effect.
• Psychological Stress: Prolonged or intense emotional stress can impact the hair cycle, leading to increased shedding.

Typically, telogen effluvium occurs approximately 2 to 4 months after the triggering event. It is usually temporary, with hair growth often returning to normal once the underlying cause is addressed or resolves. Acute telogen effluvium usually resolves within 6 months, while chronic cases may last longer and require more thorough investigation.

Hair Shedding versus hair loss

It is important to differentiate hair shedding from hair loss. While shedding refers to the natural release of hair, hair loss (alopecia) describes conditions where hair follicles stop producing hair, produce finer hairs, or where hair is lost from the scalp due to damage or disease.

Characteristic	Normal Hair Shedding	Telogen Effluvium (Excessive Shedding)	Androgenetic Alopecia (Pattern Hair Loss)	Hair Breakage (Damage)
Mechanism	Natural hair cycle exit	Premature entry into resting phase, then shedding	Follicle miniaturisation, reduced growth	Hair shaft fracture
Hairs Shed/Day	50 to 100	>100 (often 200-300+)	Variable, usually finer, miniaturised hairs	Varies; often short, broken pieces
Root Bulb	Present (small, white club hair)	Present (small, white club hair)	Present, but often miniaturised	Absent; hair snaps mid-shaft or near root
Hair Density	Stable	Temporarily reduced, then recovers	Gradually decreases over time	Overall density may appear reduced due to shorter hairs
Scalp Appearance	Healthy	Healthy	Receding hairline, thinning crown (men); diffuse thinning (women)	Can be healthy, or show signs of damage (e.g., frizz, dryness)
Underlying Cause	Natural hair renewal	Stressors (illness, childbirth, nutrition, medication)	Genetics, hormones	Chemical processing, heat styling, mechanical stress

Hair loss conditions:

• Androgenetic Alopecia (Pattern Hair Loss): This is a genetic condition causing gradual thinning. In men, it often presents as a receding hairline and thinning at the crown. In women, it typically appears as diffuse thinning over the top of the scalp, often maintaining the frontal hairline. The follicles miniaturise over time, producing finer, shorter hairs, or eventually ceasing hair production. For more information, see our guide on Androgenetic Alopecia.
• Alopecia Areata: An autoimmune condition where the body's immune system mistakenly attacks hair follicles, leading to patchy, often circular, hair loss. The scalp skin usually remains smooth and healthy. Our Anagen Effluvium article also provides relevant context for sudden hair loss.
• Traction Alopecia: Hair loss resulting from prolonged or repetitive tension on the hair follicles, typically from tight hairstyles like braids, ponytails, or extensions.
• Hair Breakage: This is not hair loss or shedding from the root, but rather the hair fibre snapping along the shaft. It can be caused by chemical treatments (colouring, perms), excessive heat styling, or mechanical stress (vigorous brushing, tight hair accessories). Damaged hairs often appear broken mid-shaft and lack the small white bulb characteristic of a shed hair. For more information, read our guides on Hair Damage and Heat Styling Safety Best Practices.

When to seek professional advice

While some degree of hair shedding is normal, it's advisable to consult a doctor, dermatologist, or trichologist if you notice any of the following:

• Sudden and significant increase in daily hair shedding: Especially if it persists for more than a few weeks.
• Receding hairline or noticeable bald patches: These are often signs of specific hair loss conditions rather than shedding.
• Scalp symptoms: Including itching, redness, pain, scaling, or pus, which could indicate a scalp condition requiring medical attention.
• Concerns about overall hair density: If your hair feels significantly thinner over time, despite no obvious increase in shedding.
• Lack of regrowth: If excessive shedding continues for many months without signs of new hair growth.

A healthcare professional can perform a thorough examination, which may include a pull test to assess shedding rates, trichoscopy to examine follicles, and blood tests to check for nutritional deficiencies (e.g., iron, vitamin D) or hormonal imbalances (e.g., thyroid function). This will help determine the underlying cause and recommend appropriate management or treatment options.

What you can do to support healthy hair and minimise shedding

For normal Hair Shedding, no specific intervention is needed beyond general healthy living. For excessive shedding (telogen effluvium), addressing the root cause is paramount. However, certain practices can support overall hair health.

• Balanced Nutrition: Ensure a diet rich in vitamins and minerals essential for hair growth, such as iron, zinc, biotin, vitamin D, and protein. If dietary intake is insufficient, your doctor may recommend supplements.
• Stress Management: Techniques like mindfulness, yoga, regular exercise, and adequate sleep can help manage stress, which is a known trigger for telogen effluvium.
• Gentle Hair Care: Avoid aggressive brushing, tight hairstyles, and excessive heat styling. Use sulphate-free shampoos and nourishing conditioners to minimise damage and breakage. Explore our guides on Sulfate-Free Shampoo Benefits and Choosing the Right Hair Conditioner.
• Scalp Health: Maintain a healthy scalp environment, as this is crucial for follicle function. Regular, gentle cleansing helps prevent product build-up and inflammation. Our articles on Understanding Scalp Health and Scalp Exfoliation provide more detail.

Watermans products and hair health

Watermans products are formulated with ingredients that help support optimal hair and scalp conditions. For example, Watermans Grow Me Shampoo and Conditioner contain biotin, caffeine, and niacinamide, which are known to support healthy hair growth and help maintain the hair's natural strength and appearance. Watermans GrowPro Hair Vitamins include zinc and biotin, which contribute to the maintenance of normal hair.

These products are designed to create an optimal environment for existing hair, helping to reduce breakage and promote the appearance of fuller, healthier hair. It's important to remember that cosmetic products support cosmetic outcomes and do not treat medical conditions causing hair loss.

Frequently asked questions about Hair Shedding

How much hair shedding is normal each day?

It's generally considered normal to shed between 50 to 100 hairs daily. This amount can vary based on individual hair density, grooming habits, and even seasonal changes. For instance, people with very thick hair might naturally shed a bit more than those with finer hair types.

Can stress cause excessive Hair Shedding?

Yes, both physical and psychological stress can significantly increase hair shedding. Major life events, illness, surgery, or chronic emotional stress can push a large number of hair follicles into the resting (telogen) phase prematurely, leading to increased shedding known as telogen effluvium, typically a few months after the stressful event.

Is it normal for hair shedding to increase after washing?

Yes, it is common to notice more shed hairs after washing or brushing your hair. This is because these actions help to dislodge hairs that were already in the exogen (shedding) phase and were loosely held in the follicle. Washing doesn't cause shedding, it simply makes pre-shed hairs more noticeable.

How does hair shedding differ from hair breakage?

Hair shedding occurs when the entire hair strand, with its root bulb, detaches from the follicle. Hair breakage, on the other hand, happens when the hair fibre snaps along the shaft due to damage, often appearing as short, uneven pieces without a root. Breakage is a sign of hair damage, not a natural part of the hair cycle.

Can nutritional deficiencies lead to increased hair shedding?

Absolutely. Deficiencies in essential nutrients like iron, zinc, vitamin D, and protein can disrupt the hair growth cycle and lead to excessive hair shedding. A balanced diet is crucial for healthy hair, and a doctor can advise on whether supplements are needed after testing.

How long does excessive Hair Shedding typically last?

Acute excessive hair shedding (telogen effluvium) usually lasts for a few months, typically resolving within 6 months once the underlying trigger (like an illness or stressor) has been addressed and the body recovers. Chronic cases can last longer and require further investigation to identify persistent causes.

Maintaining healthy hair despite natural Hair Shedding

Hair shedding is a fundamental and healthy biological process that ensures the continuous renewal of our hair. Understanding the difference between normal daily shedding and excessive shedding (telogen effluvium) or hair loss conditions is key to managing your hair health. By recognising the signs, understanding the mechanisms, and adopting supportive hair care practices, you can maintain the appearance of fuller, healthier hair. If you are concerned about persistent or significant changes in your Hair Shedding pattern, seeking professional medical advice is always the best course of action.

Sources and references

• American Academy of Dermatology Association, "Hair Loss: Who Gets and Causes", aad.org
• National Health Service (NHS), "Hair loss", nhs.uk
• Mount Sinai Health System, "Telogen Effluvium", mountsinai.org
• Cleveland Clinic, "Telogen Effluvium", clevelandclinic.org
• Stanca, V. (2023). Seasonal Hair Shedding: Is It Real?. Skin Appendage Disorders, 9(6), 406-407.
• Trueb, R. M. (2020). Seasonal hair loss in men and women. Journal of Cosmetic Dermatology, 19(5), 1069-1074.

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Find these ingredients in Watermans products

• Niacinamide: you will find this ingredient in our Hair Mask.