In the early stages of ovarian cancer, the symptoms can be quite hidden, and the patient may not feel any discomfort at all. However, as the tumor grows and ascites develops, the patient typically may experience abdominal bloating, or a palpable mass may be felt in the pelvic or lower abdominal area. At this point, symptoms such as pain in the lower abdomen may occur, especially when there is a substantial amount of ascites, leading to clinical symptoms like abdominal bloating and pain. In even more advanced stages of ovarian cancer, the tumor may invade surrounding pelvic organs, potentially causing partial intestinal obstruction or symptoms of pelvic compression. With conditions like intestinal obstruction, there will be significant abdominal pain, possibly accompanied by vomiting, especially after eating, which can exacerbate the symptoms.