Through the history of our civilization, we see that the hair is an attribute of strength, seduction and identity.
Alopecia affects a high percentage of the population.
There are different causes and triggers.
Causes of acute alopecia include stress, post partum, dieting, surgery, fever or acute infection, acute hemorrhage, medication, illness.
The factors responsible for chronic alopecia are: iron deficiency, nutritional deficits, endocrine disruption (dysthyroidism, hypoparathyroidism, hypopituitarism), renal failure, hepatitis, connective tissue diseases (scleroderma, lupus, ...).
The hair is a particular variety of hair. We own 80000 to 160000 hair. They are renewed in 3 to 5 years with a cyclical growth. In this cycle, 85% of the hair is in the anagen phase (growth), 1 to 2% in the catagen phase, 15 to 20% in the telogen phase (fall phase).
Physiologically, we lose between 25 to 60 hairs on daily bases, with two seasonal peaks in the spring and fall.
When the quantity of hair lost exceeds this value we call it alopecia. It is acute alopecia if the loss develops over more than 3 months, alopecia is acute, if it has been evolving for more than 6 months, alopecia is chronic.