Swab the area very well and slowly penetrate the 18g pin directly into the abscess. Keep pushing the pin in and gentaly aspirating every few millimeters until you hit the cyst. Slowly aspirate the cyst. You should be able to draw out the initial volume injected and then some blood and puss. You can expect to drain out 3ml from a 2ml injection 4-5 days post injection. This will give your immune system and the anti-biotics the best chance of fighting the infection. Always complete the course of anti-biotics even if the symptoms and swelling subside.
First things first. Sterility. Only use new pins and do not share, do not let the pins make contact with anything that may be hazardous by keeping the plastic covering on when not being used, use substances which you are sure are legit, reputable, and are sterile, wash hands thoroughly before any procedures, inject in a clean sterile environment, and make sure the injection site is cleaned with antibacterial agents before and after administration. It’s easy to just skip this paragraph or become lazy over time, thinking that you will be fine. If you want to reduce your risk of infections (which can be very painful and put you out of training for a while), then always think about sterility before and after administration. Be smart.