is a test used to look at a woman's reproductive organs, including the uterus, ovaries, and cervix
Transvaginal ultrasound may be done for the following problems:
Abnormal findings on a physical exam, such as cysts, fibroid
tumors, or other growths
Abnormal vaginal bleeding
and menstrual problems
Certain types of infertility
and in your case red spots might be giving indication of cyst but you will be confirmed by your doctor.