Hi,Dear,Thanks for your query to HCM. Dear I read facts of your query and reviewed it in context to your query health issues. I understood your health concerns and feel Concerned about them. Based on the facts of your query the reply of your query is- Pain in chest and left arm and neck is mostly from heavy work up.Seems to be from Muscle injuries due to heavy work up. Direct history of lifting heavy boxes with young age of yours, reduces the risks With a good lifestyle and care about your health, you need not worry of heart attack. But in the absence of other information,I would suggest you to go for Cardiac Consults.As the facts could be different from what you submitted. So looking in to the importance of heart functions,I would suggest you to rule out ischemia possibility by Consulting and investigating with Cardiologist doctor. It would be prudent to have physicial Check from Consulting Physician before planning further investigations and treatment for it. Other causes need to be ruled out in any case. Do s -suggested for your case- Check with Physician and thereafter with Cardiologist if need be Get ECG done and holtzer to rule out any cardiac ailment. Don t miss to have checks for neck and arm by EMG and Nerve Conduction tests if needed, to rule out any causes of the neck-/and left arm illnesses. Tab-Motrin-400 mg x 3 times a day x 5 days Just don t worry and be patient and co-operate with your doctors,till you verify with your attending doctors. Need to Check with family Physician and Cardiac-specialist if need be, if things don t recover. -Other causes need to be verified with your family GP doctor and team of -Specialist doctors, as the facts may be different what you submitted. -For this Second opinion from PCP-or Gp doctor and if need be with Cardiac specialist-is needed who would do proper investigation after proper physical assessment to resolve your health issues. -for early recovery-please follow above do s which would resolve your complex health issues. Hope this would help you to treat your health issues in the best way possible. Welcome for any further query in this regard. Good Day!! Dr.Savaskar M.N. Senior Surgical Specialist M.S.Genl-CVTS