Afterwards, I had some serious digestion problems, and no medical care was available.

digestion 是名词，来自动词 digest（消化），digest 由前缀 di-（表示"分开"）和词根 gest（表示"携带"）组成，字面意思是"分解并运送"，引申为"消化"的意思。digestion 指"消化过程或消化功能"。