Final answer:
Early stages of cancer are not usually associated with pain, though there are exceptions such as brain tumors, breast cancer, and cervical cancer. Pain occurs in 60-80% of cancer patients, especially in advanced stages. Pain management is the first priority in end-stage cancer.
Step-by-step explanation:
Early stages of cancer are not usually associated with pain. However, there are exceptions such as brain tumors, breast cancer, and cervical cancer, which can cause pain even in the early stages. Pain occurs in 60-80% of cancer patients, especially in advanced stages of the disease. The cause of pain in cancer is complex and involves the interaction of tumor growth, nerve involvement, and inflammation. It can be affected by factors like the location and size of the tumor, as well as individual differences in pain perception.
When it comes to end-stage cancer, pain management becomes the first priority in patient care. Palliative treatments, including drugs to relieve pain, are provided to improve the patient's quality of life.