The symptoms of pain in the middle of the stomach to the right are mainly caused by digestive system diseases, and the common causes include viral hepatitis, pancreatic cancer, gallbladder stones and so on. Because the middle of the abdomen is the centralized area of the digestive system, local inflammation or occupying lesions in the organ tissues lead to ulcerative damage or compressive irritation of the superficial mucosa or surrounding normal tissues, and the patient is stimulated by gastrointestinal fluids or external substances, causing persistent pain symptoms. However, the possibility of other diseases such as cystitis, local neuritis, and uterine fibroids cannot be ruled out, because there are also systemic tissues in the abdominal area such as the urinary system, the nervous system, and the reproductive system, which can also cause such adverse symptoms once pathological changes occur. Therefore, the specific cause of the disease requires a series of examinations at the hospital to confirm the diagnosis and treatment.