It is considered normal for a person to shed up to 100 hairs per day. However, the amount of hair a person loses in a day depends on several factors, such as age, gender and genetics.
As of 2014, more than half of the world population experiences some form of hair loss by age 50. Men are more likely to develop bald spots, while women are more likely to develop thinning. A variety of treatment options are available for hair loss, including medications and hair transplant surgeries. Alternate methods for concealing bare spots on the head include wearing wigs or toupees.