Hi.. Thanks for the query.. It looks like your cartilage at the site of piercing has got infected leading to pain and discharge, although if the discharge is less also the small amounts of discharge can be due to pus formation.. Gentian violet has antiseptic property and is more antifungal and mild antibacterial and the infection in this case is bacterial... You should take a short course of antibiotics and in case of pain you can take anti-inflammatory painkiller like Advil.. Apply antimicrobial ointment like neosporin or spframycin over the piercing site.. Avoid wearing earrings till it heals and even after that wear inert metal earrings like gold, plastic, stainless steel etc.. Hope this helps.. Regards..