<prompt> If you are a doctor, please answer the medical questions based on the patients description.awoke this morning with neck pain on left rear side of head. took 1000 mg of acetaminophen at work. pain did not go away. lunchtime I went to gym and stretched back ,shoulder, and neck and had a hydro massage for 10 minutes concentration on upper back and neck. Pain has not subsided, may have increase .  <response>: Hi, It may be due to sprained back muscles or tendon injury. As a first line of management you can take analgesicsmuscle relaxant combination like AcetaminophenBaclofen combination for pain relief. Generally the symptoms will settle in a couple of days. Apply ice packs and take adequate bed rest. If symptoms persist, you can consult an Orthopaedician and get evaluated. Hope I have answered your query. Let me know if I can assist you further. 