I have had all 3 of those piercings. Your nose is cartilage too, and to be honest, that was the most painful of the 3 mentioned. The helix is next.
And the belly button doesn't hurt much at all. I had to have it done twice and it rejected both times. I will be going a third time next month.
Make sure if you get your helix pierced that you get it done by a professional and not somewhere that pierces using guns. Needle piercings are safer and cleaner and because you generally experience swelling with a new piercing, the jewelery used by professionals is larger and accommodates for that. On a scale of one to 10 the piercings, in my opinion, hurt: Nose - 5 Helix - 3 Belly button - 1 or 2 (Didn't hurt much at all).
I haven't had ANY of those piercings done, but I do have friends that have had their cartilage (helix piercing) and their noses pierced. For the helix piercing, she said it only hurt when they had to twist her ear a little bit to get the earring in. Other than that, she said it was just like a quick sharp pain when the needle went through.
For the nose piercing, she said it was like being pinched by somebody with long nails when the needle went through her ear, but it felt a little like getting her ear lobe pierced (in other words, a sharp pinching feeling). Bwhhahaha, I hope I helped. >:D xx.
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