Telogen hair loss increases as a result of pregnancy, malnutrition, diseases, emotional stress or other metabolic events that change the biological clock of the hair follicle and this is called Telogen Effluvium (TE).

TE is examined in two forms, acute and chronic. Acute or classic TE shows up with sudden widespread hair loss 2-3 months after situations such as high fever, major surgery and delivery, and stops after 2-3 months. If the triggering factor continues, the hair loss lasts more than 6 months and is called chronic TE. The main difference between acute and chronic TE is that the duration is longer than 6 months. There can be a lot of reasons causing TE. Among these, thyroid function test disorders, vitamin B12 deficiency, folic acid deficiency, hematocrit, serum iron binding capacity, changes in ferritin level take an important place. (Avcı A., et al., 2015).