How Long Does Antibiotic Take To Treat Swollen Bicep And Tricep?

I have a hole in my right bicep. It started as an ingrown hair I believe. I just had the area tattoo d. This pore is way infected. I went to the doctor 3 days ago. I got on antibiotics, it s been 3 days now. I haven t seen any improvement in the hole. It s still oozing dark colored goo. The hole itself is about the dia. of a pencil. My bicep and tricep are swollen and red... How soon should I expect the antibiotics to start working?