If feces smells like fish what is this?

Trimethylaminuria is a rare genetic disorder in which the body is unable to break down trimethylamine, a compound that smells like fish. This can cause the person's sweat, urine, and feces to smell like fish. Trimethylaminuria is also known as fish odor syndrome. Most cases of trimethylaminuria are caused by mutations in the FMO3 gene. FMO3 codes for an enzyme that is responsible for breaking down trimethylamine. Mutations in this gene can lead to a deficiency of this enzyme, which in turn leads to an accumulation of trimethylamine in the body. Trimethylaminuria affects both men and women. It is estimated to occur in about 1 in 20,000 people. The symptoms of trimethylaminuria can vary in severity. Some people may only have a mild odor, while others may have a very strong odor. The odor can be especially noticeable after eating foods that contain choline, such as eggs, meat, and fish. There is no cure for trimethylaminuria, but there are some treatments that can help to reduce the odor. These treatments include: Dietary changes. Avoiding foods that contain choline can help to reduce the odor. Medications. Antibiotics can be used to kill the bacteria that produce trimethylamine. Surgery. In some cases, surgery may be necessary to remove the colon, which is the source of the odor. Trimethylaminuria can be a difficult condition to live with. The odor can cause social isolation and embarrassment. However, there are treatments available that can help to reduce the odor and improve quality of life.