The Diffuse Alopecia or the Telogen Effluvium is a disturbance in the hair growth cycle that triggers an abrupt and diffuse hair loss, fortunately reversible. It occurs when many hairs that are in the growth phase simultaneously go into the growth phase simultaneously pass into the telogen or telogen hair loss phase. The most common causes are:

Stress: Part of the hair that was in the anagen phase suddenly passes to the telogen phase. Cortisol, a hormone released during stress, can affect blood circulation (it slows down) and prevents the correct absorption of certain nutrients in the hair follicle, which directly affects hair growth.

Iron deficiency: Iron deficiency sometimes leads to hair loss. Some people do not get enough iron in their diets and others may not absorb it completely. Women who have heavy menstrual periods may develop iron deficiency. Low iron can be detected by laboratory tests and can be corrected by taking iron-rich supplements.

Major surgery / chronic illness: Anyone who undergoes a major operation that has an impact on the system may notice increased hair loss 1 to 3 months later. This condition usually reverses naturally within a few months, but people suffering from months, but people with a severe chronic illness may lose their hair indefinitely.

Hormonal disturbances: Caused by natural processes such as pregnancy, menopause or the use of contraceptive pills.

Thyroid diseases: Hyperthyroidism or hypothyroidism

Medications:Some specific drugs can cause hair loss, for example: cholesterol-lowering drugs, anticoagulants, anti-gout medicines, anti-arthritics, vitamin A derivatives, anti-epileptics, antidepressants, antithyroid drugs or beta-blockers for high blood pressure.