Okay, I'm not good with blender and I've just started working with modeling. What I'm trying to do is add a design onto a mask where it warps along the mask in certain places and is extruded a little bit.

Can anyone help me on this? I've tried to figure this out in Blender, Meshmixer and SculptGl Tried the stamp tools and such not getting the look I'm going for. So someone do it in blender but didn't see how they did it.

Any help would be greatly appreciated.

Any possibility of seeing a screen shot of what you are attempting and which version of Blender are you using 2.79 or 2.8 this will help us in giving you a potentially better answer

This is a mask someone made I'm trying to do a similar effect with my design on a mask I have already.

OK I see what you are trying to attempt you can either accomplish this by sculpting or using a normal texture that has the detailed baked into it and then setting up that normal map in the texture nodes the tutorial below is one of the easier ones to follow that explains this method other topics you might want to look at is baking high poly to low poly which will cover the subject matter more

How to Bake Perfect Normals in Blender - Tutorial

I would subdivide the model until the polygons are extremely small, then use the sculpting tools with dynatopo to draw the designs on the mask. You can use the mask brush to create the pattern, then invert the mask and use something like the inflate brush, or you can try out the new Face Sets brush to do something similar. Sculpting is the key to this type of pattern. In the end, you might have a model with over a million polygons, so then it would be easy to do what Lobo suggested and bake that mesh to a lower poly mesh as a normal or displacement map.

Just draw a displacement map on the UVs. Done.