Fragmentation: Quite a few things can cause the above. There are a number of sleep disorders that will trigger the above. In general if everything with sleep is otherwise good, fragmentation for any cause (pain, caffeine/medications, light, change of pattern) will go on to cause more nightmares/restlessness. Hydrate and practice good sleep hygiene (www.sleepfoundation.org). Seek help if persistent.
Answered 8/10/2017
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