Baldness, in humans, is the condition of having no or very little hair, especially on the top of the head. It has a variety of causes. The most common is male-pattern baldness, which is a genetic trait that leads to hair loss in adult males.
Despite various cultural stigmas, baldness is not harmful in and of itself, and male-pattern baldness does not signal a loss or lack of virility in men. Furthermore, cultural attitudes about male baldness are widely varied, and many regard it as a sign of masculinity. Despite this, a number of medical treatments have been developed for baldness, ranging from drug therapies to hair replacement surgery.