I have 3 cartilage piercings. But my latest one I had about done about 4 weeks ago. I changed the stud the other day to put a barbell in. But then my ear started to swell, bearing in mind I have barbells in my other cartilage piercings. My ear is a tiny bit red and it doesn't hurt either. I clean it everyday and all the time but apart from when I'm at school. There is not discharge but only a tiny bit of dried up skin when I twist it about
What could this be? Is it infected?

It could just be that your sensitive to that type of earring of its itchy, but go to your doctor just to be safe x