1.What is the principle of three-step pain relief treatment? The three-step pain relief method for cancer is a kind of pain relief method that uses different levels of pain medication according to the patients’ different pain levels. It has been widely used in the treatment of various types of chronic pain. The prerequisite for using the three-step pain relief method is to learn the assessment of cancer pain level. To classify patients’ cancer pain into mild, moderate and severe three levels of mild pain, patients have pain but can tolerate it and can live normally; moderate pain, patients have obvious pain, cannot tolerate it and affect sleep; severe pain, pain is severe, cannot sleep and can be accompanied by passive posture or manifestation of plant nerve dysfunction. After determining the pain level, then administer the drugs according to the 5 main principles of cancer pain treatment proposed by WHO: (1) Oral administration: easy, non-invasive and convenient for patients to take drugs for a long time, which is applicable to most pain patients. (2) Timely administration of medication: note that the medication is given “on time”, not only when the pain is present. (3) Three steps of drug administration: according to the different degrees of pain, the patient is given different steps of drugs. (4) Individualization of medication: the dose of medication should be determined according to the individual patient’s condition, with the aim of being painless, and should not be too restrictive and lead to underdosing. (5) Closely observe the changes of patients after medication: promptly deal with the side effects of various drugs, observe and evaluate the efficacy of drugs, and adjust the dosage of drugs in a timely manner. In addition, attention should be paid to the interaction between drugs and the comprehensive treatment combining drug pain relief with other methods. 2.Why advocate cancer patients to be pain-free? Cancer pain not only restricts the patient’s activities, reduces appetite and affects sleep, but also seriously affects the patient’s quality of life. Pain can also make patients who are already debilitated even more debilitated. It can also overwhelm patients psychologically. Cancer patients often lose hope with the onset of pain, believing that pain portends dire consequences. Chronic unremitting pain can lead patients to refuse aggressive treatment, and when the pain worsens, patients can become depressed and even consider or resort to suicide. The problem now is that some patients and family members wrongly believe that pain is an inevitable phenomenon of cancer and does not have to or cannot be controlled, and are even bound by traditional moral thinking that enduring pain is a virtue and a sign of strong will. We often see some literary works or literary reports describing someone who has cancer but still endures the severe pain and fights tenaciously at work without telling anyone or adding trouble to others. In fact, there is no need to do so. Cancer pain does not need to be endured, it can be treated or controlled. And just by the relatively simple three-step pain relief therapy advocated by the World Health Organization (WHO), it can make 90% of cancer pain patients pain-free. As for other pains that cannot be controlled, nowadays, with the high development of medicine, cancer pain can be completely controlled through radiotherapy, nerve block and psychotherapy.