Several hormonal causes can be under the origin of hair shedding.
In women, mostly low oestrogen leads to a weakness of the hair, among other combinations of hormonal deficits.
In men, many times an excess of dihydrotestosterone is within the cause of this undesired condition for some.
There has to be elaborated a complete clinical history and observation of the patient so that the diagnosis is direct.
Analytical exams should be conducted.
There are hormonal treatments that result and should always be guided medically.
Correct nutrition and adequate supplementation are also very important.