Needles and Prop

Hey guys I heard prop hurts like a bitch I done it before…but my 8th 7th jab in my butt 3days ago and it’s getting worst…no fever of yet… Very carful wipes change needle etc…I just want to know how long if infected would fever start or how would I tell if cyst is there…I’m gonna give it to 10days if it’s my nerve system