It is possible to see blood flow signals around the mass on a negative ultrasound, especially if there are blood vessels growing in the tissue within the uterus or ovaries. When performing a negative ultrasound, if a blood flow signal is seen around the mass, it is mostly an indication that there is a blood supply that supplies the mass with nutrients to keep it growing and surviving. Therefore, an ultrasound will indicate that there is an abundance of blood flow, especially in metabolically active tissues. In the female reproductive system, if you have endometrial cancer, uterine sarcoma, plasma cystic adenocarcinoma, ovarian metastases, etc., there will be rich blood flow signals around the inner nodes of the mass during the ultrasound examination. If blood flow signals are found around the mass during ultrasound examination, it is recommended to go to the hospital in time for tumor marker test, puncture biopsy and other examinations to clarify the severity of the disease and follow the doctor’s instructions for appropriate treatment.