18 hours after the shot... can feel a soreness around the injection site. probably should have thought it through a little more. with arthritis mostly in my right shoulder, i tend to sleep on my left side, but being right handed, i chose to have the shot in my left arm. just before i fell asleep i could feel the soreness growing. next shot i'll probably choose my right arm. on a scale of 10, the pain is only about a 2 or 3. if i could relate it to anything, it feels like someone may have given my arm a solid punch. visually, there is nothing i can see... no bruising at all.