I am not sure if anyone has had this problem before but I thought I would share just in case...it may help others.
About 8 days ago I injected Primo (ugl), 2 and 1/2 CCs. It was my first thigh injection. Everything was sterile, took a shower to get it warm, injected, took my time pushing the compound in, and then sterilized the spot. The next day I was so sore it was difficult to walk. The following 7 days was the same. The pain was bad but not worse than the first day. I was limping for a week.
There was no bruising, no swelling, no redness or discoloration, no warmth at the site. I was not having a fever or chills so there was no infection. I just had very sore quads. It felt like someone hit my quads with a bat.
Finally on the 8th day I went to the doctor. He was cool with the story (Israeli doctors have bigger and better things to worry about

).
He checked me thoroughly and concluded that I either hit or nicked a blood vessel. He said this can cause inner swelling and the soreness.
I know some of you here have experienced pain with injects before...quads can be the worst. He said that using a heating pad 3-4 times a day and Advil will cure it; just takes time.
I hope this helps. It just shows that the pain is not always from the compound (like prop) or an infection. There are many things that can go wrong. Be careful and remember to take every inject seriously. AIZ