hello There are two problems in you, the one which you have pain in centre of chest is probably a acidity and reflux disease. Do you upper abdominal pain, nausea, bloating, burping, increase in pain on food, sour water feeling in throat or chest burning, if yes it further supports the diagnosis. You should avoid fatty, oily and high calorie diet. Have some walk after having food instead of taking rest. Have multiple small meals instead of heavy meals. Have regular sleep habits and avoid stress. Lots of green leafy vegetables, fruits. Avoid smoking and alcohol if any. You can get prescribed tab Pantoprazole 40 mg beforebreakfast once a day for 2 weeks. Secondly, shooting pain and numbness in arm, it can be cervical pain, due to compression of nerves between spine. Does this pain increases on neck movement, is it associated with tingling, numbness in arm or any neck trauma, if yes then it supports the diagnosis. then he ll need x cervical spine AP/ Lat view and further may need mri. Till the time he can get tab neurobion forte once a day prescribed from doctor which is a nerve vitamin.