Hello,
Welcome to ehealthforum and thanks for writing us
You have provided me with information but it would have been better if you had explained the symptoms in detail as why did you have Ultrasound,present complaints,scaning of which area etc.
I would like to explain that USG scan is a painless procedure whether performed in any body part and does not cause pain either during or after the procedure.
If the pain is present even after few days then consider visiting a Physician for evaluation as it can be due to any other reason.
Hope it helps!