People develop pain for many reasons. Pain from a recent surgery, injury or medical illness is called acute pain. In many cases, this pain can be managed immediately and will usually get better in just a short time. For more serious pain, however, your primary care doctor may ask a pain medicine doctor to help manage your pain while you are healing. If your pain persists after the healing process should be over, you might have what is called chronic pain. If the current treatment you are receiving stops working or your pain begins to get worse over time, your primary care doctor may suggest that you see a pain medicine doctor. Cancer pain is another condition that can be managed by a pain medicine doctor while the patient continues to receive treatment for various types of cancer. The pain can be due to cancer surgery or treatment procedures, including radiation therapy and chemotherapy, or the tumor itself.