THERE IS THIS HUGE BLACK THING COMING OUT OF MY TURTLE'S TAIL. SOMETIMES THE TURTLE SEEMS FINE WHEN IT COMES OUT, BUT A FEW TIMES WHEN IT HAS CAME OUT (THE BLACK THING)MY TURTLE GETS VERY EXCITED AND RUNS AS IF SOMETHING IS BITING IT. IS THIS A MAJOR PROBLEM? IS THE TURLTE IN PAIN?
THANKS

