High microalbumin is not necessarily diabetic nephropathy. High microalbumin mostly refers to the presence of microalbumin in urine. Generally, any disease that can cause glomerular basement membrane damage may lead to albumin leakage, which is manifested as high microalbumin. Therefore, besides diabetic nephropathy, high microalbumin can also be seen in patients with hypertensive kidney damage, obesity-related nephropathy and metabolic syndrome nephropathy. In conclusion, no matter what the cause of high microalbumin, it is recommended to improve the relevant examinations in time, to clarify the specific causes of the disease, and then carry out targeted treatment. At the same time, diet should pay attention to scientific diet, to ensure balanced nutrition.