Understanding Hair Loss Hair loss affects 1.2 billion men and women worldwide. Baldness (technically known as alopecia) can refer to general hair loss or androgenic alopecia (male pattern baldness).
Some types of baldness can be caused by alopecia areata, an autoimmune disorder, by fungal infection, traumatic damage, such as by compulsive pulling, as a result of chemotherapy, and as a result of nutritional deficiencies such as Iron deficiency.
Excessive Daily Hair Loss: People have between 100,000 and 150,000 hairs on their head. The number of strands normally lost in a day varies, but on average is 100. In order to maintain a normal volume, hair must be replaced at the same rate at which it is lost.
The first signs of hair thinning that people will often notice are more hairs than usual left in the hairbrush after brushing or in the basin after shampooing.