Gastrointestinal inert t-cell lymphoproliferative is a malignant monoclonal T-lymphocyte proliferative lesion. People suffering from T-cell lymphoproliferative disorders are advised to go to regular hospitals for treatment to avoid delays. Inert T-cell lymphoproliferative disorders have a slow, inert process. Because it is very rare, it was only listed as one of the intestinal T-cell lymphoma subtypes by the World Health Organization in 2017, and it is easy to be misdiagnosed as an inflammatory gastrointestinal disease. The diagnosis needs to be confirmed by a specialized physician based on his/her expertise and extensive clinical experience. Gastrointestinal congestion, erosion, erythema, polyps, etc. may occur when T-cell lymphoma proliferates, and patients may manifest symptoms such as abdominal pain and diarrhea. It is recommended that patients seek immediate medical attention when discomfort occurs, and be treated as early as possible under the guidance of a professional physician to avoid delays in their condition.