When the thyroid gland produces too much thyroxine hormone, that condition is known as hyperthyroidism or overactive thyroid gland. This condition can elevate the body's metabolism and causes unintentional weight loss or irregular or rapid heartbeat. It can also mimic other health issues, which makes difficult to diagnose.

Hyperthyroidism can cause a wide range of symptoms, including:

• Weight loss
• Tachycardia- Fast heartbeat approx. -100 beats/minutes.
• Arrhythmia - irregular heartbeat
• Palpitations - heart pounding
• Increased appetite
• Nervousness,
• Anxiety
• Irritability
• Tremor - trembling of fingers and hands
• Sweating
• Changes in menstrual patterns
• Excessive Heat sensitivity
• Changes in bowel patterns, especially loose motion
• Enlarged Thyroid gland (Goiter).
• Fatigue, muscle weakness
• Difficulty sleeping
• Skin thinning
• Fine, brittle hair

Graves' ophthalmopathy: In this disorder, eyeballs stretched beyond the normal protective orbits when the muscles and tissues of eye swell. It’s very uncommon problem which is known as Grave's Ophthalmopathy.

Symptoms of Graves' ophthalmopathy include:

• Dry eyes
• Red or swollen eyes
• Excessive tearing
• Discomfort in eyes
• Light sensitivity,
• Blur vision
• Double vision
• Eye Inflammation
• Reduced eye movement
• Protruding eyeballs

Although it can become very serious if you ignore it, most people respond well once hyperthyroidism is diagnosed and treated.

The thyroid is a small, butterfly structured gland at the base of the neck. This gland has an enormous impact on health because every aspect of metabolism is being controlled by thyroid hormone.  Over activity of thyroid can be caused by grave's disease, Plummer's disease, and thyroiditis.

Treatment for Hyperthyroidism will rely upon the cause or symptoms you're experiencing, so your medical consultant will determine treatment options based on the cause.