<s>[INST] I went to sleep feeling unwell last night and have woken this morn with the right side of my upper chest and shoulder area feeling very tight & uncomortable. The tightening and pain feels worse if i turn my head to the right and the futher i turn it the tighter my upper chest feel on the right, what could this be? [/INST] Hello, Based on your description of your complaints you may be suffering from a cervical strain or commonly called a neck strain. Although you have not mentioned your age, this commonly occurs after adapting a bad posture, usually after sleeping or reading or also after travelling. I would suggest you take some muscle relaxant medication and apply pain relieving gel or balm and give hot fomentation. Usually this subsides within 4 to 5 days. If the pain and discomfort persists after a week or increases, please consult your doctor so that after proper clinical examination, he can further guide you. Wish you a speedy recovery. Hope I have answered your query. Let me know if I can assist you further.  </s>