Pus flowing from the ear piercing means that there is still infection inside the ear piercing, so you cannot wear earrings. Since some people have their ears pierced, if an inflammatory reaction occurs, especially if the inflammatory reaction is more pronounced, redness and swelling may occur, and if the redness and swelling develop further, it may lead to the existence of a purulent condition. Of course, if the purulent condition exists continuously, it needs to be treated actively. Treatment can usually be oral antibiotics followed by topical application of mupirocin ointment or erythromycin ointment. However, as long as there is pus, you should not wear earrings until the pus has subsided.