# Medical causes and management of telogen effluvium > Live situation record from CLSTR: https://clstr.news/situations/medical-causes-of-telogen-effluvium-hair-loss > Updated: 2026-10-21T10:00:00.000Z. Sources: 27. Developments: 6. Medical discussions regarding hair loss have focused on telogen effluvium, a condition where hair follicles enter the shedding phase simultaneously due to various triggers. Initial reports highlight that intense stress, illness, surgery, or rapid weight loss can cause this temporary shedding. Dr. Alan Wells notes that restrictive diets and nutritional deficiencies resulting from weight loss can act as physiological stressors that interfere with the hair growth cycle. It is noted that this condition is typically diffuse and temporary, distinguishing it from progressive patterns like androgenetic alopecia. Subsequent information identifies seasonal telogen effluvium as a natural, reversible process often observed during autumn. Dr. Nuria Martí explains that increased shedding following summer months is common. The Spanish Academy of Dermatology and Venereology (AEDV) indicates that while more hair may enter the telogen phase during summer, the shedding becomes more apparent in the fall. Research, including a long-term study from the University Hospital Zurich and findings cited in the British Journal of Dermatology, supports the link between the natural hair growth cycle and autumn shedding, noting that follicles entering the resting phase during summer result in increased shedding in September and October. Recent updates suggest this biological renewal may be linked to changes in daylight hours and circadian rhythms, which can influence hormonal regulation. To support hair follicles, experts emphasize that maintaining a healthy scalp provides a proper environment for growth. Proper care involves balancing cleaning and treatment rituals, such as washing hair two to four times a week, or daily for those with heavy exercise routines or very oily hair, to avoid dryness, sensitivity, or excessive oil production. ## Claims - Increased hair loss is frequently perceived after or during the end of summer. (corroborated by 3 sources) - Seasonal telogen effluvium is a temporary and reversible phenomenon that can affect both men and women. (corroborated by 3 sources) - Studies have observed an annual periodicity in the hair cycle, with more hair in the telogen phase during summer. (corroborated by 3 sources) - Hair loss can be caused by stress, diseases, hormonal changes, nutritional deficiencies, medications, or alopecia. (corroborated by 3 sources) - There are more than 100 types of alopecia. (corroborated by 3 sources) ## Timeline ### 2026-10-21: Seasonal hair loss and scalp care during autumn Autumn often brings seasonal hair shedding due to changes in the hair cycle and daylight. Experts recommend maintaining scalp health through balanced cleaning and treatment to support hair follicles. 2 sources. https://clstr.news/cluster/seasonal-hair-loss-and-scalp-care-during-autumn ### 2026-10-19: Dermatologist warns of seasonal hair loss in autumn Dermatologist Dr. Alborz Müşfiki warns that seasonal hair loss in autumn is often temporary but advises medical consultation if thinning is significant or accompanied by stress and infection. 2 sources. https://clstr.news/cluster/dermatologist-warns-of-seasonal-hair-loss-in-autumn ### 2026-10-16: Autumn hair loss: Causes and management strategies Autumn hair loss is often a natural seasonal process or linked to telogen effluvium. Experts recommend nutrition, specialized shampoos, and scalp care to mitigate summer damage and restore hair volume. 9 sources. https://clstr.news/cluster/seasonal-hair-loss-and-volume-management-tips ### 2026-10-11: Seasonal hair loss increases during autumn due to natural growth cycles Autumn hair loss is often a natural part of the hair growth cycle, driven by the transition of follicles into the telogen phase following summer exposure and environmental stressors. 5 sources. https://clstr.news/cluster/seasonal-hair-loss-increases-during-autumn-months ### 2026-09-29: Hair health experts address seasonal hair loss in autumn Dermatologists explain that increased hair loss in autumn is often a natural, reversible process called seasonal telogen effluvium, though specific symptoms may require medical consultation. 8 sources. https://clstr.news/cluster/seasonal-hair-loss-understanding-autumn-hair-shedding ### 2026-09-04: Stress and weight loss linked to telogen effluvium hair loss Stress, illness, or rapid weight loss can trigger telogen effluvium, a condition causing temporary, diffuse hair shedding by altering the hair growth cycle. 2 sources. https://clstr.news/cluster/stress-and-weight-loss-linked-to-telogen-effluvium-hair-loss --- Cite as: Medical causes and management of telogen effluvium. CLSTR, https://clstr.news/situations/medical-causes-of-telogen-effluvium-hair-loss