Talk to Dermatologist on Skin Infection After Nose Piercing

Asalam o alaikum. I've to ask about an infection after getting done my nose piercing. I got my nose pierced on 28th August, and then i developed a bump on piercing area. I've applied polyfax for 5 days but no betterment. Now my bump is swollen, and when i remove my stud to apply ointment, white pus comes from the area. I tried to remove the stud for 2 days, my piercing was closed but bump didn't vanish. I tried some home remedies like replacing the stud with corriander stick, tulsi stick and wooden stick. But nothing helped. What should i do? I'm attaching the picture of current condition of my nose. Please guide me. Thanks in advance.