If u hide them then thats bad. There is nothing that can hide them. :( You really need help, not mentally but depression wise, why have you cut yourself. that's a problem that needs to be fixed! let out that pain that you have with other things.
etc.
Dancing,music,biking,any type of excercise,talking,socializing,swimming,helping others,doing any other thing besides cutting. ;( thats sad, I hope you stop soon or right now.