The sub-surf modifier is causing a weird indent around the end of my sleeve right next to where I have the sleeve thicken a little and I was wondering why it was causing that and what I can do to fix it? enter image description here

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    $\begingroup$ looks like flipped normals in that area $\endgroup$ – zeffii Aug 14 '15 at 10:32
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    $\begingroup$ see this answer: blender.stackexchange.com/questions/12165/… $\endgroup$ – zeffii Aug 14 '15 at 10:36
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    $\begingroup$ It was my normals on hidden geometry. I had tried flipping the normals automatically and manually earlier and it didn't help, but after reading your comments I decided to try again and I found some hidden faces I didn't realize had been created and they were backwards. THANKS!! $\endgroup$ – Isak Jones Aug 14 '15 at 11:52