Help please !!!!

Repost.
I have a problem with subsurfed meshes please help because I need to get this done !
There are these weird marks in the mesh


Any advice would be brilliant Thank you !
Blastercast

i cant seem to work out what it is. does this only happen when subsurfing?

if looks like you might have some overlapping faces.

What do you mean can you explain i’ve only been using this since november

show us an image in wireframe, or better yet post the .blend

Its too big !

By overlapping faces we mean that there are two faces trying to occupy a space that is in exactly the same (or nearly the same) spot. And when it comes time to render they compete for who gets to show up, and you end up with black.

When smoothing everything out, subsurfing repositions where the faces lie, which could explain why you only see this with subsurf. The standard action is to go into edit mode, select all, press W then choose “remove doubles.” Near the top of your window should be some feedback like “removed 1100 vertices” or “removed 0 vertices.” Hope for something more than zero, and then rerender. (Keep in mind that if you’ve added any bones or done any shape-key animation, removing doubles can mess those up and you’ll need to redo them.)

Another possibility is that you have a duplicate mesh or object. First select your character and move him around – check to see if there are any other objects in that mid-section. If there is, delete it or turn off it’s renderability. If you don’t see anything there, then go into edit mode for your character, deselect everything, then hover your mouse over the main part of the mesh and press the L key. This selects all faces that are connected to wherever your mouse was hovering. Repeat this process with eyes (if there are any) and anything else that is intentionally detached from the main mesh. Then move that selection around, and it’s possible you’ll see some additional meshes laying in that mid-section area. If you find something, delete it!

Thank you It has worked Thank you so much everyone !!!