The most common symptom of uterine cancer is postmenopausal bleeding, which means having vaginal bleeding after menopause. Postmenopausal bleeding can be of any amount, from simple spotting to heavy vaginal bleeding, and it can occur at any time after natural menopause. Regardless of the timing or amount, postmenopausal bleeding should never be considered a normal occurrence. For premenopausal women, irregular or very heavy menses may also be a symptom of endometrial cancer, though it is most often explained by non-cancerous conditions. Less common symptoms of endometrial cancer include pelvic pain, bloating or cramping.