Telogen Effluvium Symptoms, Triggers, and Regrowth Timeline

Telogen Effluvium Symptoms and the Shedding Timeline

Cleveland Clinic says telogen effluvium is temporary hair loss caused by a stressor or change to the body, and a person may lose up to 300 strands per day. By comparison, healthy people lose up to 100 strands of hair per day.

Shedding tends to happen two to three months after the stressor or change. Cleveland Clinic notes that up to 70% of hair in the anagen growing stage can prematurely enter the telogen shedding phase. The condition usually lasts between three and six months, after which new growth appears in affected areas.

Common Triggers

Cleveland Clinic lists several physical and psychological stressors that can cause hair shedding two to three months after they occur:

• High fever
• Childbirth (see postpartum hair loss)
• Severe infections
• Psychological stress (see stress and hair loss)
• Major surgery
• Hyperthyroidism and hypothyroidism
• Stopping birth control pills
• Restrictive diets lacking protein
• Certain medications, including retinoids, beta-blockers, calcium channel blockers, antidepressants, and nonsteroidal anti-inflammatory drugs (NSAIDs)

Telogen effluvium is also the mechanism behind shedding associated with glucagon-like peptide-1 (GLP-1) medications (see Mounjaro hair loss).

How Telogen Effluvium Is Diagnosed

Cleveland Clinic says diagnosis involves a physical exam including a pull test of 40 to 60 hairs plus a review of diet and medical history.

Blood tests such as ferritin and thyroid-stimulating hormone (TSH) are used to look for contributors (see blood tests for hair loss and iron and ferritin testing). A clinician evaluates these laboratory results alongside medical history to identify contributing factors.

How Long Regrowth Takes

Cleveland Clinic says new growth appears in affected areas after the three to six month shedding period. In acute telogen effluvium, shedding lasts fewer than six months and resolves in 95% of cases.

The chronic form lasts longer than six months, affects the whole scalp, and often has no clear cause. When shedding extends past six months, a healthcare provider can evaluate potential ongoing factors.

What Helps

Cleveland Clinic lists treatment options and prevention strategies, though patients should ask a clinician which options apply to their specific situation.

Treatment options named by Cleveland Clinic include:

• Topical minoxidil
• Multivitamins with iron or iron supplements (ask a clinician before taking iron or biotin)
• Biotin supplements
• Styling techniques

Cleveland Clinic names prevention strategies including:

• Consuming adequate protein, specifically 40 to 60 grams daily
• Managing stress
• Getting 7 to 9 hours of sleep
• Avoiding restrictive diets that cause rapid weight loss

These strategies represent what the source lists rather than personal medical advice. Always ask a clinician which apply to your health background.

When to See a Doctor

Cleveland Clinic says the chronic form lasts longer than six months. Ask a clinician about shedding that lasts that long, comes in patches, or comes with scalp symptoms.

A healthcare provider can evaluate these symptoms to determine whether an underlying condition requires medical management.

This page is educational and not a substitute for a clinician's advice.

Where to Find Iron & Ferritin Test Kits