My four year old son woke up during the night and said he couldnt move. He was up off and on all night cplaimimg about his neck hurting. He cZnt move his head to the right without crying. He does not have any temperature. We have been swimming a lot lately. Could it be swimmers ear?
Your concern is suggestive of tortillas which in simple terms mean sprain on the neck. Treatment for tortillas is targeted to relax the contracted neck muscles involved. Treatments include medication, physical devices,, physical therapy, stretching exercises, and surgery. In most people, tortillas resolves in several days to a few weeks. A few people will develop continuing neck problems for months to years. Persistent neck muscle spasms may require referral to a neurologist or surgeon. I cannot say this is due to swimming but awkward positioning while sleeping could be a reason. I would give local heat and gentle massage and NSAID Chat Doctor.  Take care and regards.