Infected piercing

I've had this puss bubble now for 3 weeks I've been doing sea salt soaks for a week now and it's not clearing

Because the puss bubble is closed..

I need to pop it or something to get the puss out as it's not coming out. Inside is not infected just the puss bubble on top

Should I pop it a little with a needle to get some out and then do a sea salt soak

Help