I had this problem only with one scolymia, but the standard procedure worked as well for cynarina, symphyllya and lobo (this looks like scolymia, but is brain-shaped and multi mouthed), for candycanes too.
- Peaceful place - no mechanical damage, like frequent moving or dropping down,
- good light, like 70W PC at 7", or direct sunlight from southern window (Canada, not Arizona),
- out of the strong stream to let it relax, as for any LPS,
- feed, when it's ready - from twice a week to every day,
- give it 4 months, but general viable look should improve fast. If declines - something should be changed.
Scolymia:
Lobophyllia:
half of year later
but this was in unsuitable conditions for 3 months, I was out of place for it.
Cynarina:
Symphyllia:
Candycane:
Didn't worked for trachyphillia, though.
All were bought damaged, but recovered well - tough guys.
HTH.