Is my piercing infected??

Two years ago I got second piercings on my earlobes. There was no problem with the healing and stuff, but recently the back of the piercing on the right ear had been getting pretty gross. There's moments where the skin is dry and cracked and bleeds easily, other times there's this sticky liquid, and other times it a mix of both. This would go away and come back. I just took out the earrings because at this point I have no idea what's going on. Why is this happening years after I got the piercing??