Condition: Diarrhea
Job spoke of his “bowels boiling” (Job 30:27) as one of his afflictions (which Satan gave him). He also talked about his gall being poured out on the ground (Job 16:13). I cannot prove that these mean diarrhea, but it would seem to be an appropriate explanation. Whatever made Job’s bowels boil, God healed him. You should expect God to heal you, too.
Of course, diarrhea is definitely included under “every sickness, and every plague,” which is part of the curse for breaking the Law (Deuteronomy 28:61) and from which you are redeemed (Galatians 3:13).
If you’re traveling, you may be able to avoid this condition by not drinking the local water. This would seem to be more rational than going ahead and drinking it and then claiming your healing from diarrhea. I believe that this advice is consistent with Paul’s natural advice to Timothy about not drinking the water at Ephesus (1 Timothy 5:23).
Publius’s father was healed of a “bloody flux” in Acts 28:8, which could also have indicated diarrhea.