Kirsty - I've had many IV's over my time and get the same problem everytime (mine used to be in for a week at a time though so my veins are probably stuffed). You can get a cream (over the counter these days I believe) "hirudoid" or hiradoid I think (it has been a while) that I used to use to help calm the bruising and in turn the pain - might be worth asking your chemist or doc about if it doesn't ease up (mine used to take for ever to go away and I was always bumping the lump making it worse. HOpe it calms down for you soon.