Patients with nephrotic syndrome may experience vomiting for several possible reasons. First, nephrotic syndrome causes severe edema in patients, including edema of the gastrointestinal tract. This state of edema may lead to reduced gastrointestinal motility and symptoms of nausea and vomiting. Furthermore, patients with nephrotic syndrome have low plasma protein levels and poor immune function, making them prone to infections. If there is an infection in the gastrointestinal tract, patients may exhibit clinical symptoms of vomiting as well as potentially experiencing diarrhea, abdominal pain, and so on. Additionally, some patients experience vomiting due to the side effects of medications used during the treatment of nephrotic syndrome.