In general, the rusty odor of stool is considered to be gastrointestinal bleeding, which may be caused by peptic ulcer, aspirin and other drugs, colon cancer and so on.
1. Peptic ulcer: mostly located in the stomach and duodenum, can be caused by Helicobacter pylori infection, alcohol, gastrinoma and other causes of local inflammatory reaction and necrosis of the digestive tract mucosa, shedding, followed by the formation of ulcers. It can be manifested as epigastric pain, acid reflux, nausea, loss of appetite and gastrointestinal bleeding symptoms such as vomiting blood, black stool, blood in stool and so on.
2. Drugs: long-term use of non-steroidal anti-inflammatory drugs such as aspirin, ibuprofen, etc., non-selective inhibition of cyclooxygenase enzyme, resulting in reduced secretion of prostaglandins, decreased protective effect on gastric mucosa, causing gastric mucosal damage, such as edema, erosion, hemorrhage, etc., and symptoms of gastrointestinal hemorrhage, such as vomiting blood, black stools and other symptoms, and stools at this time are rusty due to the presence of blood components.
3. Colon cancer: refers to malignant tumor of digestive tract of colon epithelial origin, which can be caused by chemical carcinogens such as nitrosamine, heredity, peptic ulcer and so on. It can manifest as jaundice, malnutrition, abdominal pain, abdominal mass, blood in stool and other symptoms.
There are many other causes of rusty stool odor, such as ulcerative colitis. It is recommended to seek immediate medical attention for a definitive diagnosis and targeted treatment.