If your hair is thinning, there’s usually more than one reason behind it. Genetics, hormones, stress, and even your diet can all play a role. Some people have hereditary hair loss, while others lose hair due to medical conditions, medications, or harsh hair products. Hormonal changes from birth control pills, pregnancy, or thyroid disease can affect hair growth. Conditions like alopecia areata or androgenic alopecia may also lead to noticeable hair loss. Even everyday habits like heat styling or chemical treatments can weaken hair follicles. The sooner hair loss is diagnosed, the better your chances of slowing it down and regrowing hair. In this article, we’ll go over the hidden causes of hair thinning and what you can do about it.