Is it bad if you got your belly button pierced in december and puss still comes out and it closes fast and hurts to put it back in
It is not normal if there is puss coming out of the piercing as that indicates there is an infection. The reason it hurts is because the piercing has not healed as it can take 6-12 months to heal.
Yes it's bad! You have an infected piercing! You need to take the jewelry out and consult a nurse or physician.