It is common for the area post injection to be sore. It is also common for there to be a harder lump that can be tender to the touch as an injection is causing trauma to the area treated and we are leaving a full ml of compound in the muscle. Using warm and cold compresses can help mitigate the soreness. This soreness can sometime persist for a few weeks. It happens EXTREMELY rarely but is not unusual.
On occasion there can be bruising, sometimes large bruising. When a needle passes through the skin on the way to the muscle it is possible to nick smaller blood vessels, capillaries, or other blood conduits. The bruising is the blood spreading out in the skin. It is not an indication of any severe injury 99.9% of the time. We do ask that if there is any bruising make us aware of it so we can stay informed.
