Hair Shedding vs Hair Loss: What Stylists Should Know

Hair shedding vs hair loss comes down to one question: are hairs falling out faster than usual, or has something stopped the hair from growing? The American Academy of Dermatology (AAD) calls the first excessive shedding, or telogen effluvium, and the second hair loss. Shedding often corrects itself. Hair loss does not reverse until its cause stops.

Clients rarely use those words correctly. They say "my hair is falling out" for both. You are often the first person to see the change, and what you say next shapes whether they panic, ignore it, or get the right help. This guide covers what each one looks like from behind the chair and what to do about it.

How much hair shedding is normal?

The AAD says it is normal to shed between 50 and 100 hairs a day. Shedding is part of a healthy growth cycle: old hairs release so new ones can grow. A client who washes less often will see several days of shed hairs at once, which looks alarming but may be perfectly ordinary.

That last point matters in the salon. A client who shampoos once a week or wears a long-term style will release an accumulated week or more of shed hair in one session. Before you raise a concern, ask about:

• Wash frequency. How many days of normal shedding are in this bowl?
• Baseline. Is this more than they usually see, and for how long?
• Timeline. Did anything significant happen two to four months ago?

A change from the client's own normal is more useful than any count.

What are the hair growth cycle stages?

Each follicle cycles through a growth phase (anagen), a short transition phase (catagen) and a resting phase (telogen) that ends with the hair being released. Follicles cycle independently, so on a healthy scalp most hairs are growing at any moment and only a small share are resting.

Sources differ on the exact figures, which is why they are best quoted as ranges. The practical lesson is the telogen delay. A hair pushed into rest today sheds two to three months later. That gap is why clients almost never connect the shedding to its trigger.

What is telogen effluvium?

Telogen effluvium is the medical term for excessive shedding. Cleveland Clinic describes it as a type of temporary hair loss caused by a stressor or change to the body, with shedding that tends to start two to three months after the event. More follicles than usual enter the resting phase together, then release together.

The AAD lists these common stressors:

• Losing 20 pounds or more
• Giving birth
• Significant stress, such as caring for a sick relative, divorce or job loss
• High fever
• Surgery
• Recovering from an illness, especially one with a high fever
• Stopping birth control pills

Cleveland Clinic adds thyroid disorders, restrictive diets and certain medications, and notes a person with telogen effluvium may lose up to 300 strands a day.

What it tends to look like in the chair

• Shedding is spread across the whole scalp, not concentrated in one pattern or patch.
• The client reports a sudden start they can roughly date.
• The ponytail feels thinner, but the hairline and part look similar to before.
• A few months later, you may see short new hairs of similar length across the scalp.

The AAD says that as the body readjusts, the shedding stops, and within six to nine months hair tends to regain its normal fullness. It also warns that if the stressor stays, shedding can be long lived. Cleveland Clinic classifies shedding that lasts longer than six months as chronic. That is a referral point.

Postpartum hair loss: how long does it last?

Postpartum shedding is a form of telogen effluvium. The AAD says it is caused by falling estrogen levels, usually peaks about four months after giving birth, and that most women regain their normal hair growth by their child's first birthday. It is temporary shedding, and the AAD describes it as normal.

New mothers often arrive frightened. What helps:

1. Name it accurately. "Dermatologists call this excessive shedding. The AAD says it is common after birth and usually peaks around month four."
2. Give the timeline. Most women are back to normal by the first birthday.
3. Style for it. Adjust the cut and part to work with regrowth along the hairline, and keep tension low.
4. Set the referral marker. The AAD advises seeing a dermatologist if hair has not regained normal fullness after one year.

Do not promise a date. Say what the AAD says and let the client's physician handle anything beyond it.

Hair shedding vs hair loss: how do they compare?

Shedding is a temporary increase in hairs falling out. Hair loss, in the AAD's definition, occurs when something stops the hair from growing. The causes, patterns and outlook differ, so the conversation with the client differs too. The table below summarizes what the AAD, Cleveland Clinic and MedlinePlus describe.

The two can overlap. A client can have hereditary thinning and a round of stress shedding at the same time. That is one more reason the diagnosis belongs to a dermatologist.

What are the signs of hair thinning and hair miniaturization?

Signs of hair thinning that point toward loss, not shedding, include a part that widens over several visits, recession above the temples, more visible scalp at the crown, and hairs that are finer and shorter than their neighbors. That last sign is often called hair miniaturization.

MedlinePlus explains the mechanism behind hereditary pattern hair loss: too much stimulation of the follicles by androgens may lead to a shorter growth period, producing shorter and thinner strands, and the growth of replacement hairs is delayed. It describes the pattern in men as beginning above both temples. In women, the hair thins at the top of the head and the middle part widens.

You have an advantage no physician has: you see the same scalp every four to eight weeks. Use it.

• Photograph the same views each visit, with consent: part line, crown, temples, hairline.
• Compare strand diameter in the thinning zone against the back of the head. A scalp scope makes mixed diameters much easier to see. Our guide to scalp analysis for hairstylists walks through a routine.
• Check the styling history. Thinning along the hairline in a client who wears tight styles has its own pattern. See traction alopecia early signs.
• Record what you see in plain words: location, how long, what changed.

When should a stylist refer a client?

Refer whenever the picture does not fit ordinary shedding, or when shedding outlasts its expected window. The AAD states that a dermatologist can tell whether a person has hair loss or excessive shedding, find the cause, and explain what to expect. Your notes and photos make that appointment more productive.

Refer to a dermatologist or physician when you observe or hear about:

• Shedding that continues beyond six months, or postpartum shedding with no recovery after one year
• Defined bald patches, or a part or hairline that keeps changing
• Shedding with no stressor the client can identify
• Scalp pain, burning, sores, heavy scale or redness alongside the hair change
• Shiny, smooth areas where hair has stopped growing
• A child with any hair loss

A script that works: "I'm seeing more scalp along your part than I did in the spring. I can't tell you why, and I don't want to guess. A dermatologist can. I'll write down what I'm seeing so you can take it with you." Our article on when to refer a client to a dermatologist covers the handoff in detail.

Understanding hair shedding vs hair loss does not make you a diagnostician. It makes you a reliable first observer who gives accurate information and refers at the right time. If you want structured training in the growth cycle, scalp observation and referral, the USTI trichology pathway starts with the Hair Loss Practitioner course, taught as a 2 day live virtual class with educators.

New to the field? Start with What is trichology? or look up a term in the trichology glossary.

Sources

• American Academy of Dermatology, Do you have hair loss or hair shedding?
• American Academy of Dermatology, Hair loss in new moms
• Cleveland Clinic, Telogen Effluvium
• Natarelli N, Gahoonia N, Sivamani RK. Integrative and Mechanistic Approach to the Hair Growth Cycle and Hair Loss. Journal of Clinical Medicine, 2023.
• MedlinePlus Genetics, Androgenetic alopecia