Positive urine protein may be caused by physiological factors such as fever, strenuous exercise, etc. It may also be caused by pathological factors such as urinary tract infections and kidney diseases. 1. Physiological factors: large amounts of food containing high protein, strenuous exercise, fever and other factors may lead to increased protein content in the urine, positive urine protein. The patient’s kidneys have no organic lesions, no special treatment is needed, and the urine protein can usually turn negative by itself after rest. 2. Pathologic factors: (1) Urinary tract infection disease: for example, cystitis or pyelonephritis, after the aggravation of the infection, it may lead to the appearance of protein in the urine and appear positive for urine protein. In addition, it may be accompanied by pain in urination, frequent urination, urgency, pain in urination and other symptoms. (2) Kidney diseases: for example, glomerulonephritis, diabetic nephropathy, etc., may affect the filtration function of the kidney, and protein molecules enter into the urine, which may lead to an increase in the protein content of the urine, and a positive urine protein. It may also be accompanied by swelling of the lower limbs as well as swelling of the eyelids. Positive urine protein may also have other causes, it is recommended that patients go to the regular hospital in time, complete the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or therapy.