Precautions for chronic lymphocytic leukemia include paying attention to diet, paying attention to hygienic habits, keeping an optimistic mindset, and paying attention to rest. 1. Pay attention to diet: patients with chronic lymphocytic leukemia mostly have gastrointestinal reactions, such as nausea, vomiting, abdominal distension, etc., they should pay attention to diet and eat less and more meals. Eat more fresh fruits and vegetables rich in vitamins, consume high protein food such as tofu, soy milk, etc. Food should be semi-liquid or soft food, such as porridge. Do not eat spicy, greasy, difficult to digest food, as well as drinks, such as coffee, strong tea, etc., quit smoking and alcohol. 2. Pay attention to hygiene habits: patients with chronic lymphocytic leukemia generally have low immunity, so they should pay more attention to hygiene, take baths, wash their hands before meals, and go out for good protection to avoid contact with toxic and harmful substances. Patients are easy to bleed, can use soft bristle toothbrush to prevent bleeding from brushing teeth. 3. Maintain an optimistic state of mind: Emotions are very important to the development of the disease. Maintaining an optimistic state of mind can help regulate immunity, improve the quality of life, and keep a relaxed mood, which will help the recovery of the disease. 4. Pay attention to rest: patients with chronic lymphocytic leukemia should pay attention to more rest, which can help the recovery of immunity and physical strength. If there is any discomfort or aggravation of the disease, it is recommended to consult a doctor in time and receive standardized treatment under the guidance of a physician.