👉 Thyroid dysfunction, also known as hyperthyroidism or hypothyroidism, is a condition in which the thyroid gland produces too much of a hormone called thyroxine (T4). This can lead to symptoms such as weight loss, fatigue, and difficulty sleeping. Thyrotoxicosis occurs when the body's thyroid hormone levels become excessive, causing it to produce more T4 than the body needs. This can be caused by various factors, including stress, infections, or certain