What level of cancer pain needs to be treated, and does mild pain also need to be treated? When a patient experiences pain, the cause of the pain should first be clarified in order to assess how much risk the pain poses to the body and whether it will lead to further physical damage. If the pain does not temporarily affect sleep or diet, it is recommended to take some simple pain medication, such as non-steroidal analgesics. If the pain is progressively getting worse and is slowly starting to affect sleep and diet, or even affecting the treatment of the cancer, then it is necessary to see a pain specialist as soon as possible, and to put pain relief on an equal footing with the treatment of the cancer. Will using painkillers on my own when I have mild pain mask my condition? Using painkillers when the cause of the pain is undetermined can easily mask the condition. Clinically, many patients have already developed to moderate to severe pain before they go to specialist outpatient clinics. At this time, the damage of organs and nerves of the patients has already been very serious, but the use of painkillers or even acupuncture and massage on their own masks their condition and makes the pain more and more serious. Therefore, once the tumor patients have pain, they should first go to the specialist for diagnosis and treatment, to figure out the cause of pain first, and then carry out the purposeful pain treatment, which is the most appropriate and reasonable. What painkillers can be used when patients have moderate or severe pain? Morphine tablets or morphine controlled extended-release tablets, oxycodone controlled extended-release tablets, fentanyl transdermal patches, etc. are more commonly used in China, which are reliable and safer in terms of analgesic effect from the pharmacological point of view. According to the past principle of three-step treatment for cancer pain, the treatment of mild pain is based on non-steroidal anti-inflammatory analgesic drugs, moderate pain is based on codeine and tramadol, and severe pain is based on morphine. However, according to the new analgesic standard for cancer pain, it is emphasized that analgesic drugs should be used in sufficient amount and as early as possible. For example, it is recommended to use strong analgesic morphine for mild and moderate pain, and adopt slow-release preparation, which has the following advantages: [First] strong analgesic drugs are very effective; [Second] the pain-relieving effect can be maintained for a long time by using a small dose of painkillers; [Third] the speed of tolerance to painkillers can be slowed down to the maximum. Appropriate use of painkillers can enable patients to live pain-free, improving the quality of life and patients’ confidence in fighting tumors. Drug tolerance refers to the use of analgesic drugs, in the absence of changes in the level of pain, the need for analgesic drugs to increase the dose. Clinical manifestations of the initial dose of analgesic drugs, with the amount of time to take the amount of time to take, and then take, the pain relief effect is not as obvious as the original. In the beginning, taking one tablet can relieve pain, but the ability to treat pain decreases, only using two or even three tablets of medication to effectively relieve pain, which means that the patient slowly develops a tolerance to painkillers. Moreover, when the pain worsens, effective pain relief can only be achieved by using larger doses of painkillers. However, if you use a full dose of a strong controlled release analgesic when you first experience moderate pain, you can achieve very good pain relief from the very beginning, and in the long run, the rate of tolerance will be significantly slowed down, as well as reducing the side effects of the drug.