I had a little bit of a problem with my hand where the cannula was, the vein had gone hard from the point where it went in to the wrist, this was at 2 weeks. I asked the nurse when she came to take out my staples and she said it was bruising that had caused it. Fine it eventually went.
Now I'm 6 weeks on Wednesday coming and the last three days it throbs but not very often, and maybe only lasts a few minutes.,
I had problems with it in hospital. I used my hands so much to push my body around in the bed it was really painful. When they had finished with the intravenous drugs they kept promising to take it out but didnlt do it. In the end it was so sore I took it out myself (got told off) and it was bruised and sore for a few days. No problems now though. I do think that little vein in your hand takes a bit of a battering though.