Eva Longoria -- I've ALMOST Rid My Body of Tony Parker

Eva Longoria has a nasty red blotch on the back of her neck -- and she's probably THRILLED about it ... 'cause it used to be a tattoo of her ex-husband's basketball jersey number.

Back in January, Longoria began laser treatments to erase 3 Tony Parker-inspired tats -- the "NINE" tattoo ... the wedding date tattoo on her wrist ... and Tony's initials (which were put on a very private, undisclosed location).

Tattoo removal doesn't happen overnight -- it takes multiple sessions, which have to be spaced out over several months.