How to get rid of these stange unwrap things

Hello pople,

IM just starting with blender, and i am very exited about the program.

Bu t no after a couple of weeks I ran into some problems.

If you see this picture I pointed this with green.

I made some sames, for unwrapping this and this went good, I think.

But when i place the texture I see those strange disforming in the textures. This is on the place ware the mesh is very round.

What did I do wrong.

You have some stretching of the texture so adjust your UV unwrap

Yes I thing so.

But how do I do that. Shout the UV map not be whitout the streching?