I want to do B ultrasonic examination causes dysmenorrhea, but menstruation

During menstruation is generally not recommended for vaginal B-ultrasound examination, easy to cause infection caused by gynecological inflammation, you can choose abdominal B-ultrasound. Need to pay attention to abdominal B-ultrasound should drink more water to hold urine, bladder to achieve filling state, can be abdominal B-ultrasound, clear observation of uterine conditions.