The most common cause of hair loss is low thyroid function, which is common among menopausal women. Other causes include, but are not limited to: changes in hormone levels (decrease or increase), increased testosterone, increased stress (physical or emotional), various medications, scalp/dermatological issues and heredity. Any time sudden hair loss is experienced, one must consider events which took place up to three months prior to the hair loss, as factors affecting hair loss can often take up to three months to have an effect, i.e., were you diagnosed with something new in the past few months? Did you start taking medication during the past few months? Did you go through a traumatic experience (death of a loved one/friend, divorce and any other event that can be categorized as 'traumatic'). Subsequently, any treatments for hair loss should be given at least three months to have noticeable effects.