My boyfriend has a painful, red bump which has grown within the past week in his ear. It appears to be on the outer ear canal, visible when looking into ear. It is fluid filled and he says it goes down when he takes a shower and lets the hot water hit it. But then it almost seems to "fill up" again afterwards.

He originally thought it was a pimple, I can guarantee it is NOT. He tried puncturing it with a clean sterile needle and it was extremely painful, it bled and some puss came out as well and shrank a little but is still large and painful.

Is this something serious, does he need to go to the doctor, has anyone else seen anything like this? I've searched the internet and couldn't find anything so if anyone can help, PLEASE it would be so appreciated.

Thanks.