dysgeusia       
noun [ U ]  medical specialized uk/dɪsˈɡjuː.zi.ə/ us/dɪsˈɡjuː.zi.ə/
 味觉障碍,味觉失调
a change in someone's sense of taste, so that foods taste strange, or so that the person has a strange taste in their mouth
  Dysgeusia has a variety of different triggers, from the common cold to dementia.  味觉失调可能由多种原因引起,从感冒到失智症都有可能。 
 Most people with dysgeusia describe very specific and unusual tastes. 绝大部分味觉失调的人都会说他们能尝到特殊而且异常的味道。 
 - More examples
 - Dysgeusia can affect you while you are eating or drinking and even when you are not consuming anything by mouth.
 - The number of patients who reported dysgeusia – a taste disorder in which a foul, salty, rancid, or metallic taste persists in the mouth – increased as the dose increased.
 - After the radiation therapy she had dysgeusia, ulceration, pain, and bleeding.
 - The most common side effects observed in clinical studies were dysgeusia (distorted taste), and pain in fingers or toes.