Benign polyps and malignant polyps are difficult to distinguish based on symptoms alone, as both may present with symptoms such as bloating, stomach pain, belching, acid reflux, nausea, vomiting, and indigestion. A gastroscope exam is needed to differentiate between them. During a gastroscopy, if the polyp’s surface is smooth, without lobulation, and has a wide base or a sessile form, it is more likely to be benign. If the polyp has a lobulated and uneven surface, bleeds easily upon touch, and is relatively fragile, it is more likely to be malignant. A biopsy is required to determine whether it is benign or malignant.