Infected- nipple piercing help

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I've had my nipple piercing for a while now

The left one is perfect but the right one pusses and it goes all crusty in the morning

I have a puss bubble on top of the piercing where the hole is

I've been doing sea salt soaks once a day and tea tree oil but doesn't work

I need to take my bars out to breastfeed when my baby is here but I can't take it out yet until infection is gone

What's the best thing to use.

Help