I have this thing on the back of my neck that started out looking like a really big zit but now it's draining and got bigger.
Bug bite or not is irrelevant at this point. Looks like it has turned into a boil/furuncle. Get it checked out and treated.
It is hard to know if this is a bite - regardless if it is a bite or a pimple/follicle that was congested at this time, it is infected. You need to see an MD - go to Urgent care or to your physician immediately.
Monika Korff, MD