Typical presenting signs are weight loss, tachycardia and increased appetite.Hyperthyroid disease can be fatal, but in most cases the disease is a long term chronic wasting process.

• 本病的诊断根据临床症状和血液中的甲状腺素水平作出，甲状腺素T-4的检测方法有多种（见本文相关参考资料），也可以送商业化实验室检测。