3. Weight changes
Weight changes do not often go unnoticed and may be a red flag that is warning of thyroid trouble. The problem will likely be unexpected weight gain for those suffering with hypothyroidism while those whose metabolism has been accelerated due to hyperthyroidism may find that they are losing weight for no apparent reason. While losing weight without even trying may sound wonderful, hyperthyroidism has other risks that could trigger much more serious problems and it should be addressed right away.