I had inguinal hernia surgery on right side and now on left side I have simialr discomfort;howevr, ultrasound doesnt show hernia. What can it be?

Uncertain . It could be muscle, they could be a hernia that was not discovered. It could be from something in the pelvis be that is the cause. You need to discuss this with your physician and maybe your gynecologist.
Need more info. Hard to answer your question without knowing more about you and the type of surgery you had for the right hernia repair. It is very important to make an appointment with your surgeon & have him/her re-examine you. If you are not satisfied with his.her advice then please do not be afraid to get a second opinion from another surgeon preferably at a large medical institution.

Related Questions

I have had inguinal hernia surgery on right side and now sometimes I have pain just above surgery location on left side with no signs of hernia. Is it possible to have inguinal hernia without bulge?

Possible but unlikel. With hernia you should be able to feel the bulge unless it is early stage. It is worth getting it checked out. Read more...
Groin pain. Always possible. Would wonder about muscle or ligament strain. Try some ALEVE (naproxen) or ibuprofen. See your PCP if persists. Read more...

I had right side inguinal hernia surgery 1 month ago and now I have right testices pain. So what should I do?

See your surgeon. Anytime you have testicular pain it's probably a good idea to see your doctor. Given that you have had a surgery on the same side and in the same general area as your testicular pain, i would recommend you seeing your surgeon for a physical exam to rule out more serious issues that could be developing. Read more...
Common. Testicular discomfort from temporary nerve hypersensitivity is common after inguinal hernia surgery & usually resolves over a few months. Best to follow up with your surgeon to be sure all is healing properly. Read more...