Diabetic proteinuria 3+ usually does not cause chest and back pain, it is recommended to seek medical attention. Diabetic proteinuria 3+ usually suggests the presence of diabetic nephropathy, may be asymptomatic or foamy urine, edema, etc., generally does not cause chest and back pain, such as chest and back pain need to consider the presence of angina pectoris, peptic ulcers, gastroesophageal reflux, pleurisy, etc., need to be timely to the hospital, improve the electrocardiogram, coronary CTA, gastroscopy, lung CT, etc. to further clarify. If diabetic patients find proteinuria 3 +, need to pay attention to, in accordance with the doctor’s instructions to improve renal function, 24-hour urine protein, urine microalbumin/urine creatinine and other tests, in the control of blood glucose on the basis of kidney tonic, urinary protein and other treatments to slow down the progression of kidney disease. Diabetic proteinuria patients are advised to go to regular hospitals, need to follow the doctor’s prescription treatment, so as not to delay the condition.