Hello Your husband is having 2-3 motions early in the morning and also threw up ( vomiting ) . Colonoscopy and perhaps endoscopy ( through throat ) are normal . Such type of symptoms may be due to these reasons these include: 1 Amoebic colitis , diagnosis can be confirmed by stool examination for entamoeba histolica . Physical examination also find out palpable colon on both side of abdomen . 2 Tension is the next reason of such symptoms as I have noted in many patient that day to day anxiety or tension develop frequent motion 3-4 times early in the morning .So be careful about that also. 3 Over eating is the another important reason ( most probable in your husband case ) . Due to overeating patient develop hyper acidity or gastritis ( also feels nausea and vomiting as in your husband case) and forced to pass stool until complete evacuation of bowel . Since he is not having diarrhea so need not to worry but consistency of his stool is most probably semisolid ( undigested ) so change the diet and avoid over eating and you will feel difference . But for vomiting he may need drugs like pantaprazole-d , once or twice in day on empty stomach . I recommend only change in diet and habit ( bowel evacuation ) . Hope this will be useful for you.