If you have a good appetite and you and you notice that you have started losing weight for no apparent reason, you could be experiencing thyroid weight loss. This could be as a result of an overactive thyroid gland, a condition known as hyperthyroidism. With this condition, your body burns up extra food for no other reason but to produce heat. If you had been losing weight before 
the onset of hyperthyroidism, you will start experiencing other unpleasant systems too, accompanied by weight loss.
If you are diagnosed with an overactive thyroid gland by your doctor, you need to establish whether, first of all, it is a temporary condition, and whether it is mild. Secondly, ask your doctor about the best treatment options available for you. In some cases, it is best to wait and see whether the thyroid gland will return to its normal functions. It is possible for the thyroid gland to become underactive, after having been overactive. If hyperthyroidism remains untreated for a long time, it cannot resolve on its own. This may lead to very unpleasant symptoms, including thinning of the bones in severe cases, heart failure as well as irregular heartbeat. If the thyroid gland is severely overactive, death may eventually occur. In some cases, patients with this condition are treated with pills, especially for certain types of severe hyperthyroidism which have high chances of future self –correction. In other cases, patients can be treated using radioactive pills which are swallowed. However, this treatment option can cause your thyroid gland to become underactive. Another treatment option is surgery.
It is important to know that after you have been successfully treated for hyperthyroidism, and you were overweight before the onset of this condition, you are most likely to regain weight. The amount of weight you are likely to gain is related, in part, to whether before the onset of hyperthyroidism, there was a tendency toward gaining weight. It will also depend on how much weight you had lost before the condition was treated. Some people are known to gain even more weight than they had before suffering from hyperthyroidism.
When a person is being treated for hyperthyroidism, his or her endocrinologist should be in a position to tell when to start treating the patient for an underactive thyroid (hypothyroidism). In cases where the thyroid’s condition is changing fast, the results from your doctor’s test will be interpreted in a different way than when the status of the thyroid is stable. If hypothyroidism is treated too soon, then the hormone replacement therapy could lead to too much thyroid hormone. However, when the endocrinologist establishes that hypothyroidism has occurred, the patient will require lifelong treatment with thyroid hormone. In addition, if there is a delay in treating hypothyroidism, the patient stands the risk of gaining more weight.
In the past thyroid weight loss has been practiced by some people. Various studies have shown that more weight loss can be achieved by treating people using excess thyroid hormone treatment than can be achieved by dieting alone. However, people usually gain back the weight they have lost once the excess thyroid treatment is discontinued. In addition, use of excess thyroid hormone treatment for weight loss may affect your health in negative ways, including loss of muscle protein as well as other metabolic issues. Therefore, thyroid hormone treatment for weight loss should only be availed to people who are suffering from thyroid problems.