Weight changes. Hyperthyroidism can be a reason of both gaining weight and weight loss. If one does not change his/her common way of life but feels rapid body weight changings – it could definitely be hyperthyroidism.

Heartquake. Heart beating pace changings may also be caused by thyroids problems. Your heart needs thyroid hormones to work properly. Increase or decrease in the level of those hormones change the way your heart beats. For instance, hypothyroidism slows down the heart pace. A patient may not even notice this on early stages.

Bowel function fluctuations. The majority of people with thyroid problems complain about non-stable bowel functions. Incorrect work of thyroid causes metabolism changings. Thus, bowel behavior may also change. If a person has low thyroid production, the bowel works slowly due to the slow metabolism. Such person may feel constipated often. On the contrary, when metabolism is extremely high, this is the reason of diarrhea and frequent defecation.