Red flags The following findings are of particular concern: Vomiting (especially if vomit is green or bloody or occurs > 5 times a day Constipation or diarrhea, especially with blood or mucus Fever Respiratory distress Lethargy Poor weight gain Interpretation of findings Often, infants with colic present after days or weeks of repetitive, daily crying; an otherwise normal history and examination at this point is more reassuring than in infants with acute (1 to 2 days) crying.