In recent years, with the westernization of our lifestyle, the incidence of prostate cancer is increasing year by year. However, because it mostly occurs in the elderly, it often does not get the attention it deserves, often mistaking it for other old age diseases and delaying treatment. 1. Poor urination, mistaken for prostate enlargement: Most elderly people have prostate enlargement, and they are mostly treated at home with oral medication, and they think they are not sick when their urine symptoms are relieved. Many clinical patients are given a PSA check and are found to have mid to late stage prostate cancer. There are also patients who visit the clinic with acute urinary retention, and the physician who sees them should also be alert and not give up further examination after giving general treatment. 2. Bone pain and arthralgia, mistaken for senile osteoarthropathy: Many patients with bone pain and arthralgia always think it is rheumatoid arthritis and take oral pain medication at home, many of them are bone metastasis of prostate cancer, reminding elderly people with bone and joint pain that they must have their prostate checked. 3. Loss of vision and blurred vision, mistaken for presbyopia, cataract, etc.: Some of the elderly people’s vision loss is caused by prostate cancer bone metastasis involving the orbit, so they must be alert to such patients.