I have had dozens of canulas, and it varies a lot as to the reaction.
There are two types,the stainless steel ones which are very rigid and unforgiving, and the bendy teflon plasticky looking ones which are more bendy and better suited to being placed near joints.
Basically the soreness during is from nerves, and after bruising, the bruises hurt and cause swelling which can take a few weeks to calm down completely if there has been a gusher inside.
You can get lucky and the canula goes in 1st time, right where it is needed and it stays put and when removed there is very little bruising and a speedy recovery.
Other times as you have experienced it can nick the blood vessel and cause bruising and yep it hurts. You can even do that to yourself with a canula in place and accidentally catch it on bedding or clothes or in long hair. OUCH !!! I've had a few mishaps with that happening.
I've had them in the wrist, back of the hand , crook of the elbow and once in an ankle.
You don't need to go to hospital with this.
What you are experiencing is normal.
Stop prodding and poking it, (ice packs will help at 1st,) but after that, pain killers like paracetamol will do and leave it to recover, which it will do in time.
I've had some very sore ones and hardly noticeable ones too.
One paramedic trainee in A&E asked if he could practice on me on one occasion, with a canula in the back of the hand. I was on morphine at the time.
He botched it and it came right through to my palm.
He was profoundly sorry, and a nurse took over and did a 1st class job. I told him not to worry, I understood that is an acquired skill and he certainly did need more practise, but not on me, and teased him a bit about it. I didn't hurt that time it happened because i was drugged up, but it bruised afterwards.
I do get annoyed with them. I can see the benefits for nurses, but as a patient, stuck with the things 24 hours a day in hospital is not fun and especially when they are plugged up an not being used. It's a different matter if they are in use with a drip or for blood letting, but i get annoyed when they leave them in and they are there 'just in case'.
Rest assured Sue, what you are experiencing is normal and it will recover.