What might cause a sharp pain or a spasm under the ribcage on left side of the body?
Any chest pain should be checked out by a doctor as soon as possible - even at an ER if necessary. Most people think of heart attacks as being the sudden pain and collapse they see on television, but the symptoms are often much less obvious than that. Here's a link to information on the signs/symptoms of a heart attack and some other cardiac information. I recommend you contact your physician to discuss what you're experiencing to determine the cause.
Heart Attack Symptoms and Warning Signs
Stress and Heart Disease
All the best,
Lisa Nelson RD
Heart Healthy Tips