<s>[INST] What is it when a heart stings after having palpitations? Am I trying to have a heart attack? I m overweight 5 3 about 166lbs. Bi-polar Disorder, acid reflux are all my problems. But the palpitations were different and certainly the stinging sensation. [/INST] Hello!Thank you for asking on HCM!Your symptoms are not typical of coronary artery disease or a heart attack.Gastro-esophageal reflux or avmusculo- skeletal pain could be the cause of your symptoms.Anxiety can also trigger palpitations.Anyway, if the problem persists, I would recommend consulting with your doctor for a physical exam and some tests:- a resting ECG- a chest X ray study- Complete blood count for anemia- thyroid hormone levels for thyroid dysfunction- blood electrolytes for imbalance.Hope to have been helpful!Kind regards,Dr.Iliri </s>