A thyroid disorder occurs when the thyroid gland, located in your neck, produces too much or too little hormone, impacting your body's metabolism and various functions.The two main types are:Hypothyroidism (underactive thyroid): The gland doesn't make enough hormones, leading to symptoms like fatigue, weight gain, and feeling cold.Hyperthyroidism (overactive thyroid): The gland produces too much hormone, causing symptoms such as anxiety, weight loss, and a rapid heartbeat.Diagnosis involves blood tests and sometimes imaging. Treatment typically includes medication, but can also involve radioactive iodine therapy or surgery.