Side effects associated with a high thyroid count, or hyperthyroidism, include behavioral transformations, systemic reactions and changes in appearance, according to WebMD. For example, people with this condition often become anxious, nervous or short-tempered. Getting a good night's sleep becomes problematic.
Hyperthyroidism symptoms appear in many of the body's systems. The digestive system is affected, because bowel movements are loose and occur more often, WebMD reports. Arrhythmia, which is an erratic heartbeat, can appear in seniors. Women's menstrual flow is reduced, and periods are sporadic. Muscle weakness occurs, particularly in arms and thighs. Some people experience double vision, and their eyes occasionally protrude.
At times, hyperthyroidism leads to weak and damaged hair, explains WebMD. People suffer thinning hair or even hair loss. Skin also becomes thin. On the other hand, nails tend to grow fast. Sweating becomes a problem, as do shaking hands. Although people eat more, they may lose weight.
These side effects suggest hyperthyroidism, and blood tests that check hormone levels prove it, WebMD states. A radioactive iodine uptake test, thyroid ultrasound or thyroid scan is sometimes used to gather additional information. Doctors often recommend drug therapy or surgery as treatment for hyperthyroidism. If the thyroid is removed or impaired by treatment, lifelong hormone therapy is needed.