Avoid alcohol, caffeine, milk and dairy products. Resume a normal diet 2 or 3 days after the diarrhea stops. Avoid fruit, alcohol and highly seasoned foods for several more days. Mucus, blood or worms appear in the stool. Stool is black or tarry.
Severe pain develops in the abdomen or rectum.
Signs include dry mouth, wrinkled skin, excess thirst, little or no urination.