[header] How to treat thinning hair [title] See if hormonal causes are at play. [step] The most common cause of thinning hair for both men and women is a hereditary condition in which sex hormones cause hair to fall out in a particular pattern. While male or female pattern baldness is permanent, there are certainly measures you can take to slow it down and treat it. 
[substeps] Sometimes hormonal fluctuations lead to impermanent hair loss. Women who are pregnant, have discontinued birth control, or are going through menopause may experience temporary hair thinning.