Membranous nephropathy is getting thinner and thinner, which is generally considered to be related to protein loss and loss of appetite. 1. Protein loss: most patients with membranous nephropathy have hypoproteinemia. It is related to the impaired glomerular filtration of patients, which will easily cause a large amount of protein loss, and then cause malnutrition, which will easily lead to weight loss. 2. Loss of appetite: Membranous nephropathy can easily cause gastrointestinal edema, which in turn causes loss of appetite and slowing down of gastrointestinal peristalsis, which in turn leads to adverse effects on the digestive system and weight loss. It is recommended that patients go to regular hospitals to receive standardized treatment in a timely manner, and at the same time, under the guidance of nutritional doctors to actively supplement nutrition, to avoid long-term indigestion can easily cause other complications.