It is recommended that nasal feeding elderly people inject 1500-2000mL of water a day is appropriate, but if the patient’s physical condition is poor, such as the presence of heart failure and other diseases, the amount of fluid intake needs to be controlled. If the nasal feeding elderly do not have serious diseases, it is recommended to inject roughly 1500-2000mL of water a day, because 1500-2000mL is the amount required by the normal body physiology, which can ensure sufficient water intake for the body, supply the cellular tissues, speed up the metabolism and help the health of the body. If the nasal feeding elderly have heart failure, kidney disease and other diseases, they need to strictly control the amount of fluid injected in a day, otherwise it is easy to aggravate the disease and cause tissue edema. It is recommended to consult a doctor for details and let him/her calculate the amount of fluid injection according to the patient’s condition. It is not possible to give a specific value, but needs to be determined according to the patient’s urine volume and actual condition. It is recommended that nasal feeding of the elderly should be injected in several times, about 200-300mL each time, to avoid increasing the burden on the organs. It is recommended that the temperature of the injected water should be approximately 38°C to avoid irritation of the gastrointestinal tract due to the water being too cold or too hot. It is recommended that the nasal feeding of the elderly must be well cared for, and at the same time, nutrition should be properly strengthened, such as giving some bone broth, chicken soup, etc. to help strengthen nutrition.