Telogen alopecia

Telogen alopecia (telogen effluvium) is a reversible, usually diffuse hair loss that occurs when an abnormally large number of follicles prematurely enter the resting phase (telogen). It typically intensifies 2–3 months after a trigger (stress, illness, childbirth, surgery, deficiencies) and manifests as a reduction in volume without distinct “patches.”

How it differs from other forms, briefly:

• Diffuse alopecia — a picture of uniform thinning; the telogen type is a common cause, but not the only one.
• Androgenetic — thinning in specific zones (in women — the central parting, in men — the frontal-temporal area and crown).
• Alopecia areata — hair loss in patches with clear boundaries.

Why diagnosis is important: it is essential to confirm the telogen nature and identify the root cause — the treatment plan and speed of recovery depend on this.

Hair grows in cycles:

• anagen (growth);
• catagen (transition);
• telogen (rest);
• exogen (natural shedding).

Telogen hair loss is a condition where too many follicles prematurely and simultaneously enter the telogen phase, and after 6–12 weeks, diffuse but even shedding begins across the entire scalp without distinct bald patches.

Mostly telogen hairs fall out — full hairs with a whitish bulb at the end, indicating the cycle is complete rather than breakage. The scalp is usually free from inflammation, and the hairline remains intact.

Once the cause is addressed, follicles return to anagen, and hair density gradually recovers. It is important to identify the cause as early as possible and consult a trichologist: early diagnosis speeds up the stopping of the process and the restoration of density.

In short, the causes of telogen hair loss are external and internal triggers that simultaneously shift many follicles into the resting phase.

• Stress (acute or prolonged) — triggers diffuse shedding 6–12 weeks later.
• Hormonal fluctuations — postpartum period, thyroid dysfunction, starting or stopping hormonal contraception.
• Deficiencies and lack of protein and calories.
• Illnesses and surgeries — infections with high fever, general anesthesia, flare-ups of chronic inflammatory conditions.
• Rapid weight loss, strict diets.

Remember the 2–3 month delay between the triggering event and noticeable hair loss. When searching for the cause, it is important to review the recent period and assess stress, nutrition, illnesses, and medications.

Telogen alopecia is characterized by diffuse shedding without clearly defined areas. Common signs include:

• Daily hair loss above the usual norm.
• Delayed onset: shedding increases 2–3 months after stress, illness, childbirth, surgery, or deficiencies.
• Even thinning: a thinner ponytail, a wider parting, without distinct bald spots.
• The scalp is usually calm: no inflammatory plaques, crusts, or scarring, though sensitivity may occur.
• Wave-like course: periods of intensified shedding lasting weeks or months followed by remission.
• Psychological discomfort: anxiety, reduced confidence, desire to protect the hair.

What is very important?
If you notice abnormally heavy hair loss (above your usual norm), consult a doctor. With telogen alopecia, growth often recovers, but waiting and hoping it will resolve on its own is not advisable. The cause must be identified and addressed.

Diffuse telogen hair loss is the uniform shedding of hair across the entire scalp without distinct bald patches and without scarring. The cause is the simultaneous shift of a larger number of follicles into the telogen phase.

How does it differ from other types of alopecia?

• Androgenetic alopecia.
  Hair roots are overly sensitive to androgens, especially DHT, so the hair gradually becomes thinner and shorter. This process develops over years and does not require an external trigger.
• Alopecia areata.
  The immune system mistakenly attacks follicles in specific areas. Shedding occurs in waves. Stress or infection can provoke an episode, but the root cause lies in immune system dysregulation.
• Scarring alopecia.
  Inflammation destroys hair follicles and replaces them with scar tissue, so hair in those areas does not regrow. Causes include autoimmune skin diseases, infections, thermal and chemical injuries, or prolonged tension from hairstyles.

The key to remember: with telogen hair loss, the process is usually reversible, but the cause must be identified by a specialist to ensure the correct treatment is prescribed.

Chronic telogen alopecia is diffuse hair loss that lasts longer than six months or periodically recurs in waves. The follicles remain viable, but hair volume noticeably decreases.

Diagnosis is based on:

• medical history collection;
• analysis of events in recent months;
• trichoscopy;
• pull test (gentle traction on a bundle of about 50–60 hairs in different scalp areas; if more than 5–6 hairs remain in the hand, it indicates active shedding).
  Laboratory tests and, if necessary, a phototrichogram are prescribed as indicated.
  The prognosis for this type of alopecia is favorable.

After identifying and eliminating the cause, and following medical recommendations, shedding gradually decreases and hair volume recovers.

After a trigger, telogen hair loss usually begins within 6–12 weeks, peaks at the 2nd–3rd month, then gradually subsides and on average lasts 3–6 months. If the cause is not eliminated, the process can extend to 9–12 months.

When are improvements visible?

Shedding decreases first; within 1–3 months short new hairs appear, visual density typically improves within 3–6 months, and the return to usual length and volume takes 9–12+ months.

What does the duration depend on?

The quicker the cause is identified and corrected (deficiencies, hormonal imbalances, stress, medication effects, consequences of illness/surgery), the shorter the episode and the faster the recovery.

Key point: early diagnosis and addressing the cause speed up recovery and restore thickness.

The goal of therapy for telogen alopecia is to eliminate the cause and help follicles return to the growth phase.

• Eliminating causes. Correcting deficiencies (iron, vitamin D, B12, folates, zinc), thyroid disorders, consequences of stress/infections/surgeries; reviewing medications — in consultation with a doctor.
• Nutrition. Sufficient protein and calories; a balanced diet with sources of iron, vitamins, and trace elements; proper hydration.
• Hair and scalp care. A care regimen prescribed by a trichologist/dermatologist: washing frequency, gentle shampoo, conditioner along the length, careful combing, heat protection, avoiding tight hairstyles and aggressive procedures.
• Vitamin and mineral support. Only based on test results and prescribed by a doctor (no self-treatment or “megadoses”).
• Professional methods. In-clinic procedures prescribed by a doctor as an additional measure.

It is important to identify and correct triggers in time and to establish gentle care and proper nutrition. If you notice abnormally heavy shedding or if it persists, book a consultation.

To avoid telogen hair loss, follow these simple rules:

• Sleep and stress: sleep 7–9 hours, exercise regularly, use relaxation techniques, and take breaks during periods of strain.
• Nutrition: ensure daily adequate protein intake, consume iron-rich foods, sources of vitamin D, B vitamins, and zinc; avoid crash diets and rapid weight loss.
• Medical prevention: have a basic check-up once a year — complete blood count, ferritin, thyroid function assessment; undergo additional monitoring after childbirth, infections, or surgeries.
• Medications: discuss any prescriptions or discontinuations with your doctor, and report changes in hair condition during treatment.
• Care: gentle washing, conditioner along the length, careful combing, heat protection; avoid tight hairstyles and aggressive procedures.
• Periods of increased strain: maintain supportive nutrition, sleep, and moderate activity during stress and while recovering from illness.

In short: prevention means routine, a deficiency-free diet, and gentle care. It does not replace diagnosis — if you notice increased shedding, consult a doctor.