I have had 16 Zoladex for endometriosis. Two of the last three have been extremely painful and caused severe swelling and bruising. It is now 2.5 weeks since the last one which was agony. I saw my GP today as there is still bad bruising but also can feel two hard and tender lumps, the GP said there was deep bruising in the muscle which will take a while to resolve. Surely this is negligence by the nurse who did it? I looked online and it says to take care not to penetrate muscle. Has this happened to anyone else?