Every hair has three growth phases – anagen, catagen and telogen. After that they naturally fall out. Therefore, we can lose 50 to 100 hairs a day from the scalp. Due to changes in our hormonal system, this natural hair loss becomes more pronounced at certain stages of our life: postpartum, menopause (due to reduction of the hormone estrogen). Such hair loss is usually self-limiting and does not require treatment.
Another group of causes are chronic diseases like diabetes, anemia, thyroid disorders, lupus or skin conditions. Hair loss can also be an individual reaction to some medications: cancer treatment, antihypertensive and heart failure drugs, antidepressants and other drugs. In this case, it is first advisable to eliminate the cause by treating the underlying conditions.
There are other harmful factors that can accelerate hair loss – smoking, excessive sun and heat exposure, alcohol consumption, frequent hair drying. Sudden hair loss can also be caused by severe emotional overload and stress.