Do cartilage piercings close

Yes, they do- however, it depends alot on the gauge of the needle and how capable your body is able to heal (which factors on age, diet, and health). The fresher the piercing, the less time it takes to heal shut- but it is more prone to infection. Smaller piercings do have a tendency to heal quicker, but it mostly depends on the area of skin that is pierced. Fleshy skin located close to blood vessles heal very quickly when hard cartilage and sparser areas of blood vessles take much longer. Note: ALL piercings should be done with a hollow needle.