Hi welcome to the health care magic I appreciate your concern Your husband having loose oily stool since many weeks... So it is better to consult physician for examination Abdominal pain is not present, hence you can Consul your doc electively in one or two days Malabsorption syndrome, steatorrhea, Celiac disease, altered bacterial flora, bacterial overgrowth etc can be the cause If needed stool fat estimation, microscopy examination, USG abdomen done as primary work up Include more fiber in diet like fruits, green leafy vegetables, whole grains etc(if Celiac disease diagnosed than Avoid gluten diet) Probiotic tablet can be prescribed.. According to cause further specific treatment given Take care Hope your concern solved