What Causes Sudden Muscular Spasms In The Neck?
Take treatment as advised
I have gone through your question and understand your concerns.
This can be muscular spasm occurring due to prolonged working in a single posture.
Any history of fever, headache, vomiting, rhinitis?
Any drug intake apart from Motrin ?
You should take pain killers with muscle relaxant like Etoricoxib or Aceclofenac with Thiocholchicoside or Tizanidine.
Just try to stay rested for the time being and be vigilant for any further worsening of symptoms.
Hope you found the answer helpful.
Do get back to me for further queries.
Dr N Kumar