Hello, Welcome to Healthcare Magic. Increase cholesterol can occur in several conditions like: -Excess fat intake -Overweight person -Metabolic disorders -Hormonal disorder In hormonal problem, hypothyroidism can lead to increase cholesterol. In presence of hypothyroidism basal metabolic rate (BMR) of body reduces, which lead to reduction of metabolism of fat in body. If your clinician suspecting thyroid issue in your case, then they used to order thyroid test at initial assessment and in follow up. You can also tell me about other associated symptoms to understand case and help you better. all the best.