Low protein in the elderly will not directly cause fever, but long-term low protein will lead to a decline in the resistance of the body of the elderly, which is prone to colds and fever. Low protein in the body of the elderly will lead to hypoalbuminemia, malnutrition, emaciation, loss of appetite, fatigue, decreased mobility, memory loss, anemia, swelling, bradycardia and other symptoms, low protein can also lead to spontaneous bleeding, life-threatening. Low protein needs to be taken seriously in time, it is usually recommended to take a high vitamin, high protein diet, if the protein is low for a long time and accompanied by uncomfortable symptoms, it is recommended to consult a doctor in time, and under the guidance of a professional doctor for treatment.