Early stage of prostate cancer has symptoms such as frequent urination, urgency of urination, incomplete urination, urinary retention, etc. In the late stage, it can have symptoms such as bone pain, anemia, emaciation, lower limb edema, defecation difficulty, etc. However, the staging and identification of prostate cancer mainly relies on pathological examination, and the symptoms are only auxiliary diagnosis. 1. Early stage of prostate cancer: the first symptoms of patients are frequent urination, urgent urination, incomplete urination, increased nocturia, etc. As the tumor increases, it can lead to urinary retention or incontinence. 2. Advanced stage of prostate cancer: when bone metastasis occurs in advanced stage patients, there may be bone pain, spinal cord compression symptoms and pathological fracture, etc. Blood in semen and erectile dysfunction may also occur, and with the long-term consumption of tumor, the patients may have anemia, emaciation, lower limb edema, defecation difficulty and other symptoms. Symptoms of prostate cancer are only a part of auxiliary diagnosis, and cannot identify whether it is early or late stage, and further pathological examination is needed to confirm the diagnosis.