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The Facts

People with cancer often feel severe or constant pain. The pain they experience depends on the type of cancer they have, the stage the disease is at, and the therapy they receive. Approximately 25% to 50% of people with cancer complain of pain at the time of diagnosis, and up to 75% of people with cancer complain of pain as the cancer progresses. Cancer pain can be defined as a complex sensation that reflects both damage to the body and the body's response to the damage. Although doctors agree that controlling cancer pain is a high priority, pain isn't always understood or treated properly. This is often because of unfounded fears about people with cancer becoming addicted to painkillers. About 85% of people suffering from cancer pain find pain relief through medication therapy. Pain control is extremely important, not only for people suffering from advanced cancer, but also for those whose condition may remain stable for years to come.

Causes

Physical cancer pain has two sources:

Nociceptive pain refers to pain relayed by nerves with the job of conveying damage in a part of the body. The pain is usually felt as aching or pressure – most cancer pain feels like this. refers to pain relayed by nerves with the job of conveying damage in a part of the body. The pain is usually felt as aching or pressure – most cancer pain feels like this. Neuropathic (nerve) pain refers to pain caused by damage inside the nervous system. The pain is usually felt as sharp shooting and stabbing sensations. Experience of pain is often a combination of different types of pain. Pain can also be made worse by the fear of pain itself or of getting sicker. People can experience intense short-term acute pain or long-term chronic pain from cancer. The pain can also be part of a cancer pain syndrome. Cancer pain syndromes can be caused by tumours that:

invade soft tissue or bone (including bone fractures)

squeeze or infiltrate nerves or blood vessels

obstruct a hollow organ like the intestines

hemorrhage into a tumour

Cancer pain syndromes may also occur as a result of substances (hormones, proteins) produced by cancers that affect the function of other tissues and organs. Cancer pain syndromes may also follow surgery, radiation therapy, or chemotherapy. Identifying the cause of the pain is essential because knowing the cause makes managing the pain easier. Regardless of whether the cause is known or not, pain should always be adequately treated. If pain is not adequately treated in the short term, it can worsen and become more difficult to control later on. The assessment of cancer pain is an ongoing process requiring constant attention to new pain. New pain or changes in pain patterns may signal minor problems that are treatable. But changing pain is often a sign of growing disease. Because cancer pain management relies on the treatment of the disease causing the pain, finding the reasons for any new pain is extremely important.

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Symptoms and Complications

Cancer pain can be described as dull aching, pressure, burning, or tingling. The type of pain often gives clues about the sources of the pain. For example, pain caused by damage to nerves is usually described as burning or tingling, whereas pain affecting internal organs is often described as a sensation of pressure. The type of pain someone experiences also says a lot about their cancer. Pain and changes in pain can precede other signs of disease or complications a few months ahead. The way someone feels a pain might be the only tip-off to a potentially life-threatening condition. For this reason, it's important to communicate changes in how you feel to your doctor. Cancer pain involves many complex relationships between complicating factors. It often involves pain caused by other problems that are indirectly started or made worse by the spread of cancer. For example, shingles, a painful skin infection, is far more common in people with cancer, possibly because of damage to their immune systems. But immune system problems may be further complicated by side effects from cancer treatments that also contribute to cancer pain. Radiation therapy and chemotherapy may significantly harm tissues and nerves, and surgery can damage nerves. Many people with cancer take pain relievers just to offset these problems, which may continue after the cancer is treated. The psychological effects of cancer pain can be devastating. Pain makes suffering worse by increasing feelings of helplessness, anxiety, depression, and despair. Whatever the status of the cancer, uncontrolled pain may prevent someone from working productively, enjoying recreation, or taking pleasure in family and their surroundings.

Cancer pain affects quality of life in four main ways:

medbroadcast.com - Cancer Pain - Causes, Symptoms, Treatment, Diagnosis

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