Swollen cartilage piercing Watch
Keep it clean (hot water and salt, but not too much salt.) Don't take the piercing out for much longer than a minute or two. When putting the newly sterilised piercing in, run it under the cold tap for a few seconds so it doesnt heat up the surrounding skin. I didnt take mine out for a month after piercing, just use cotton buds with warm salty water. Try not to take it out for at least another few weeks.
Cartilage takes longer to heal for first (mine took over a month and a half) but after it is healed you can leave the piercing out more and more.
If you hold one end of the piercing in one hand while its in your skin, if you turn it around (if you are able) and you can feel it "sticking" as you turn, it means it's starting to get infected. I wouldnt take it out in any case until the first heal, but if infection is starting, DEFINITELY dont take it out as it can cause many problems such as drifting and inability to get it back in (as well as full blown infection setting in, if it does set in, youll need to see a doctor, who will probs tell you to take it out for good)
Hope this helps.