As relatives of cancer patients, once they learn that their loved ones, especially their beloved ones, are suffering from malignant tumor, it is often like a bolt from the blue, and they are overwhelmed and confused all of a sudden; then they are overwhelmed with grief and cry out loud and are sad. The grief caused by such unexpected misfortune is completely understandable. In the face of this sudden blow, how should the patient’s family respond properly? First of all, they should face the reality that their loved ones have cancer frankly. They should take the initiative to communicate with the medical staff openly and honestly, and learn about the disease, treatment plan and possible prognosis in as much detail as possible, so that they can cooperate with the medical staff to carry out thorough treatment and care. As the primary relative, you should also take on the task of coordinating family members. It is important to ensure the normal work and life of the whole family, but also to take the responsibility of accompanying and caring for the patient in turn. It is important to show calmness, organization, coordination and composure, to be “tight inside and loose outside” and to be organized, especially to stabilize the emotions of the elderly and children. Second, at the appropriate time, convey the true information about the patient’s condition to the patient. Family members should work together with medical staff, when the conditions are ripe, can adopt suggestive language, cleverly and gradually to the patient to convey the true message of the disease. It is important to observe the language and to be flexible in terms of proportion and rhythm, so that the patient can slowly accept the reality without realizing it. This will help the patient to be prepared for his disease, so that he will not be suspicious; it will help the patient to cooperate with the medical staff for treatment and promote the early improvement or recovery of cancer. It should be said that relatives are the most qualified and capable of deciding how to reveal the truth of the disease to the patient, as they understand the patient’s life background, personality traits and psychological strength. It is not only undesirable, but also impossible and harmful, if one is too worried that the patient will not be able to withstand the shock of being informed, or if one is concerned about consequences such as pessimism and suicide, and wants to maintain permanent secrecy. If you are too secretive and evasive with your loved ones, you will cause or aggravate the patient’s doubts, worries and anxiety, which will affect the treatment effect. As a matter of fact, during the treatment process, the patient or the patient’s friends will inevitably know about the disease, and once it is passed on, it may cause the patient to feel cheated and produce negative psychology such as aggression, anger or despair, thus refusing treatment or having light thoughts about life, which is really the wrong thing to do with good intentions. Family members should also encourage the patient to bravely fight against cancer, explain that cancer is not terrible and there is hope for improvement or cure, so that the patient can be relieved from pain, sadness and despair as soon as possible. They should accompany the patient as much as possible, so that he can fully feel the consideration and warmth of family and relatives, enhance the confidence to fight against the disease and rekindle the hope of life. According to statistics, the majority of patients can treat cancer correctly after being informed, and some of them live a very comfortable, happy and energetic life. Furthermore, relatives should fully understand and actively channel the sometimes unavoidable bad emotions of cancer-stricken relatives. Some patients may have big psychological changes, or they may be irritable or negative, and they often lose their temper and even make things difficult for medical staff, and they may be critical and unreasonable about the care of their family members. At this time should be fully understanding, never argue, with good words to soothe, more warm words, words of comfort, try to meet the patient’s reasonable requirements. Some pessimistic and disappointed patients, often alone, sullen, silent, refusing to talk or interact with others. At this time, family members, especially spouses, should actively and actively talk with them and tell some interesting and humorous stories to make them happy and cheerful, so that they can cheer up their spirits and laugh at cancer; at the same time, they should encourage them to participate in cultural and sports activities within their ability, so that they can gradually integrate into the group and return to the society. This is extremely beneficial to the recovery of cancer.