Several years ago I went on a holiday to thailand, after going into the ocean with a cut on my knuckle and grazed it on coral, ignored it, causing it to become infected.
The infection seemed to have spread to the regional gland/lymph node (cubital node) and when I got home I was given several different antibiotics none of which cleared it completely.
The gland continues to flare up from time to time (it also never completely went back down) at the same time around the site of the scar/infection, a cluster of blisters come up and ulcerate.
I also have a general feeling of unwell and have come to think this happens every time my immune system is low.
Do you know what it could be or what I should do next to treat this?
The last doctor suggested removing the gland but couldn't promise that the infection wouldn't travel up to the next gland/lymph node. HELP! :(

Yes you need to boost your immune system for ONE thing.
Taking antibiotics gets rid of the bad bacteria but also the good so it is in effect tearing down your immune system. You need to get some probiotics. Do not take them within 6 hours of taking antibiotics though.
Astragulas root, siberian ginseng and echineachia are good for boosting your immune system too.
Make sure they are compatible with any meds you are taking though.