Changes in weight can happen for many reasons, including diet, activity, sleep, stress, medication, age, and medical conditions. However, when weight gain or weight loss is persistent, significant, or difficult to explain, it may be worth reviewing more closely. Unexplained weight changes do not always mean there is a hormonal problem. In some cases, they may be one part of a broader pattern involving endocrine, metabolic, lifestyle, medication-related, or other health factor