If you are female, it could be an ovarian cyst. It could also be due to internal scar tissue, which forms when cysts develop, then rupture. But you need to see a doctor for an exam, to rule out anything serious.
ovarian cysts
If you have pain in your lower abdomen, along with cramping, you may have trapped gas. You can take something to help you pass the gas.
Pregnancy. Or hormonal imbalances? not sure...
See your medical professional.
Yes. There are muscles in your right abdomen that you could pull which would cause pain.
could be a herina
Some women do report feeling some light cramping and possibly spotting at the time of implantation. Therefore tightening or tension could be cramping like that. ~pawsalmighty
Cramping is a sign of overuse. The muscles are being exhausted. Exhaustion is not going to cause long-term damage but watch for wrist pain or other joint pain. That could be causing damage.
The pinching in your abdomen could be the feeling of implantation cramping. You could be pregnant. When implantation happens you will also see a brownish, sometimes pink, discharge. It usually isn't very much, but still it's there. You should make an appointment with your doctor to confirm or deny.
I am not sure exactly what nerves innervate the back, but I would assume that it could definitely refer to the abdomen.
A kidney stone is possible, get a ultra sonogram done. balaji_shyam@yahoo.in
kidney stone, pulled adhesions, infection
A rigid abdomen could be a sign of peritonitis or Wilms tumor.