Piercing hurts! (With update)

Calla

I got my ears pierced a month ago and my left ear hurts occasionally but not my right I wash my hands before cleaning,I clean them front and back with the stuff they gave me,and I twist them. Why does it hurt it? Is it infected or something? I was gonna switch them out for the first time but I decided against it because my left ear hurts

**UPDATE**

It’s infected :/