The condition of having a hyperactive thyroid is called hyperthyroidism. A hyperactive thyroid can also be called an overactive thyroid. A thyroid having this condition produces excessive amounts of the hormone thyroxine. Many of the symptoms of a hyperactive thyroid are associated with the body’s metabolism. These symptoms can be similar to symptoms of different health problems, which can make it difficult to diagnose a hyperactive thyroid. Once diagnosed, however, most people respond well to treatment.
Weight and Appetite
A hyperactive thyroid can result in an increased appetite. However, even with an increased appetite and an increase (or no decrease) in the intake of food, there can be a sudden loss in body weight.
Heart Symptoms
A rapid heart rate is a symptom of a hyperactive thyroid. This is usually greater than 100 beats per minute. Other symptoms include an irregular heartbeat and heart palpitations, which is the pounding of the heart.
Anxiety and Tremors
A symptom of a hyperactive thyroid is tremors. This is usually manifested as small trembling movements of the hands and fingers. An increased feeling of anxiety, including anxiety attacks, is also a symptom. Nervousness and irritability are also symptoms.
Pattern Changes
Symptoms that are changes in patterns include changes in the menstrual cycle. Also, a change in bowel movements, especially an increase in frequency, is a symptom of a hyperactive thyroid.
Other Symptoms
A hyperactive thyroid can result in difficulty with sleeping, an increase in sensitivity to heat, muscle weakness, fatigue and sweating. There can also be the appearance of an enlarged thyroid gland, called a goiter, which appears as swelling at the base of the neck.
Older Adults
The symptoms of a hyperactive thyroid in older adults can be nonexistent or more subtle, such as intolerance to heat, becoming tired during ordinary, everyday activities and an increase in the heart rate.
Graves’ Ophthalmopathy
A hyperactive thyroid can result in a condition called Graves’ ophthalmopathy, which is a condition that affects the eyes. Symptoms include swelling or inflammation of the eyes, reddening of the eyes, eyeballs that protrude, the production of tears in one or both eyes, discomfort in one or both eyes, double or blurry vision, sensitivity to light and reduced movement of the eyes.
