Hair loss usually begins two to four months after the incident that caused the condition and lasts around six months. New hairs begin to develop soon after a hair falls out, although considerable growth may not be seen for several months. Hair that is not caught before it drops will stay off the scalp for several weeks or months before falling out. On average, men lose about 100 strands per day. Women can lose as much as 30-50 strands each day. Strands that are not lost due to natural processes such as aging or disease development call for action. There are many factors that can cause individuals to lose their hair, with some causes being medical problems, medications, stress, and more. Hair falls out because of how our bodies work. When we experience an event that causes pain or injury to the head, the first thing that happens is that blood flows into the area to protect other parts of the body. This results in new cells forming inside the scalp where they remain until they reach the end of their lifespan, which is usually about 110 years for women and 120 years for men. As these cells die they release pigment that gives your hair its color. Over time this process leaves your hair thinning or bald on top. However, the bottom line is that hair falls out because of how our bodies work; there is no need for alarm unless you cannot explain the reason for your hair's absence.