Whitish stool is a symptom of a problem with the digestive system. It is caused by a lack of bile salts, which are necessary for digestion and absorption of fats. It appears as pale, clay-like stools, and may be accompanied by other symptoms such as abdominal bloating, gas, and constipation. Whitish stools can develop suddenly or gradually, and can be a sign of a serious underlying condition. It is important to consult a medical professional to diagnose and treat the underlying cause.