Hair loss involves the hair from your head slowly decreasing in growth over time. Without intervention, it often results in the hair thinning, patchiness if there is any new growth, or in some cases, baldness. There are numerous conditions that can affect the hair and scalp and result in hair loss. And diseases like alopecia areata, anemia, male/female pattern baldness, and infections of the scalp can lead to considerable decrease in quality of life. Because there are many types of hair loss and many conditions that cause hair loss, finding the cause can be challenging.