dyspepsia       
noun [ U ]  medical specialized uk/dɪˈspep.si.ə/ us/dɪsˈpep.si.ə/
 消化不良
any symptom, such as discomfort or pain, coming from the upper digestive tract
  Dyspesia is often related to eating. 消化不良通常跟进食有关。 
 Synonym: indigestion