<s>[INST] sharp pain in my left arm that comes & goes sharp to dull ache in & around left shoulder blade , pain now & again in chest with what feels like static sometimes a burning sensation. unusual taste in my mouth & a pulling sensation in my chin & neck also im belching a lot , i feel extremely cold one minute then hot but the pain in the arm is quite new. [/INST] Hello, The pain in the arm and chest or neck could be related to a pinched nerve, probably caused by a bulging disc in the cervical vertebral column. For this reason, I would recommend consulting with your attending physician for a physical exam, a cervical spine X-ray study and some other blood lab tests (complete blood count, PCR, ESR, blood electrolytes, thyroid hormone levels). A cervical spine MRI study may be needed. Hope I have answered your query. Let me know if I can assist you further.  </s>