I encountered this problem on the daz millenium subdragon's wings before. It happens in areas that are very thin. The 2 fixes for it that worked were:

1. In your render settings, check "remove backfacing polys"

2. Go to the advanced material room, and select the material zone of the area you're having the artifacts. Add a simple color node to the displacement for those particular material zones, and set it to around .01. You might have to mess with that number a bit to get the results you want.

Not sure if your problem is the same, but it might be worth a shot to try these things. If it's for personal use, the first trick would be best, but if you're planning on selling this, you definitely want to find the cause of the issue or use #2. Hope it fixes your problems!