How can i reduce swelling around my 10 week old cartilage piercing?

Ear/ nasal cartilage: Seek medical eval. High ear piercings through cartilage have ^ risk of infection ; lack of healing because of minimal blood supply to auricular cartilage. You can develop a perichondral abscess as well auricular perichondritis. If you ear is hot, red, swollen or has increasing pain you need medical evaluation.

Natural process: The good news is that area has fantastic blood supply and so healing will occur rapidly. Inflammation (red, hot, tender swelling) is the body increasing blood flow to the injury to bring healing factors to the area and also the veins expand to carry bad stuff away. Dressings and ointments are of no value there. Avoid further trauma to the area and let nature take it's course. Motrin/advil help.