Hair loss, also known as alopecia, refers to the partial or complete loss of hair from the scalp or other areas of the body. It can occur due to various factors, including genetics, hormonal changes, medical conditions, and certain medications. The most common type is androgenetic alopecia, often referred to as male or female pattern baldness. In addition to genetic factors, hair loss can be triggered by stress, poor nutrition, or underlying health issues such as thyroid disorders or autoimmune diseases. Treatments vary and may include medications, lifestyle changes, or hair restoration procedures, depending on the cause and severity of the condition.