What kind of injection? What was the location? How long has it been? The chances are that the two are not related, but if the pain continues for long, or if it increases, you should speak to your physician.
spinal injury
Many many possibilities but one common occurrence is an infection and/or inflammation in the vermiform appendix.
Most of the time ... nothing. But - nick an artery (or even a big vein) and get a blood clot in the epidural space and with a bit of luck (all bad) you end up paralyzed from the waist down.
The hip line and waist of a trouser is right below the belly button. This is where most people wear there jeans.
wool jacket ,that helps right, i will be right there mom.
flank
The abdominal region on the right side of the groin is called the right flank.
The Filipino folk dance Subli is a stately devotional dance. The hayon-hayon step is when you place one forearm in front of the waist and the other at the back of the waist, as if taking a bow.
You are probably using the synthetic cloths. You please use the cotton cloths. Make sure that they are not tight.
The cause of the pain could be several things: an injury to the muscles, kidney infection, gall bladder infection, etc. The only way to know the specific cause is to be examined by a doctor.
below your waist
The sudden blood loss, shock, and pain would most likely knock you out.