Hyperthyroidism, or overactive thyroid, happens when the thyroid gland produces too much thyroid hormone.It can cause a variety of symptoms, including:
High amounts of T4, T3, or both can cause an excessively high metabolic rate. This is called a hypermetabolic state. When in a hypermetabolic state, you may experience a rapid heart rate, elevated blood pressure, and hand tremors. You may also sweat a lot and develop a low tolerance for heat.
Hyperthyroidism can also cause atrial fibrillation, a dangerous arrhythmia that can lead to strokes, as well as congestive heart failure.
Graves’ ophthalmopathy is an eye condition associated with Graves’ disease. It can cause red, swollen and bulging eyes, as well as sensitivity to light and double vision.
Hyperthyroidism can lead to thinning or brittle bones, or osteoporosis. This is because excess thyroid hormone prevents the body from using calcium, a bone-strengthening mineral.
Graves’ dermopathy is a rare condition in which the skin, often on the child’s shins and feet, becomes red and swollen.
This is a sudden onslaught of symptoms such as rapid heart rate and fever. If you think your child is experiencing a thyrotoxic crisis, you should always seek immediate medical care.
Other symptoms of hyperthyroidism include:
The following symptoms require immediate medical attention:
References:
http://www.healthline.com/health/hyperthyroidism#symptoms3
http://www.childrenshospital.org/conditions-and-treatments/conditions/hyperthyroidism/symptoms-and-causes