There are many reasons why an individual may begin losing hair over their lifetime. These often include hereditary factors, changes in hormone levels, medications such as steroids and chemotherapy, thyroid disorders, and infections, as well as a variety of other causes.
Hereditary hair loss is the most common cause of hair loss. It is also known as male-pattern baldness, female-pattern baldness, or androgenetic alopecia. You can inherit the baldness trait from either your mother’s or father’s side of the family and hair loss may start as early as your late teens. Men may see a receding hairline and bald patches, especially on top of their head, while women tend to notice more diffuse thinning of the hair or a wider part when they style their hair.
Visible hair loss occurs when the health of the hair follicle deteriorates due to lack of nutrient absorption and a variety of other factors. The hair follicle begins to shrink, producing hair that is much thinner. As this is happening, many hair follicles also begin to experience shorter growth stages, causing less hair to be grown at any given moment