It could mean a number of things. To ensure it's not something very serious, please get him to your doctor or the hospital immediately!
Neck, left upper chest, wrist
The heart is just a little to the left (your left) of the center of your chest.
in the chest cavity on the left of your own body
Because the heart was developed from tissues that makes it go to the left side.
in your chest slightly over to the left, very slightly.
The upper left part of his chest.
Where on your body are you experiencing this problem?? Head, neck, chest, abdomen, etc...
In the chest cavity positioned to the left from the center of the body.
the heart is in the same position in both males & females...it lies beneath the left breast-approximately.
yes, I have them down my leg, across my chest, on my back and on my arms.
Go call an ambulance, get to the hospital. Could be a heart attack!
Your best bet is to ask a doctor. It could be anything from a problem with the shoulder joint, a cracked rib, pinched nerve or numerous other things. Sounds like you may have damaged a pectoral muscle.