A mass on the right side of the uterus is a more vague term for a mass on the right side of the human uterus, which can be a mass of the ovary, fallopian tube, greater omentum or an appendiceal cyst, the underlying nature of which cannot be determined and the specific situation needs to be analyzed. The most common in the clinic is ovarian cysts, if they are simple cysts, they are usually seen in fertile women, the ovaries of such patients have developed through puberty, there is already a formal cycle, during ovulation, follicular cysts can appear, they can also be physiological cysts, or corpus luteum, etc. Patients are advised to visit a specialist hospital in time for relevant investigations and symptomatic treatment if they find this symptom.