So my grandfather is 89 and diabetic, and he dosent like to show pain, what are signs he might be having a heart attack?

Follow with Drs: Because of the possibility of peripheral neuropathy many diabetics do not present with symptoms during small heart attacks than only show on the ekg. He should have regular appointments with the drs pcp and cardiologist. Very subtle or rare symptoms like jaw pain, wrist pain or other nonspecific could be angina-equivalents. Obviously thoracic pain in the area of the heart ( chest pain) is typical.

Many: Sometimes, no symptoms may be present. More often exertional fatigue, loss of energy, shortness of breath, heart burn, nausea, chest tightness may be signs. Occassional congestive heart failure manifesting as swelling of legs, sob, and trouble laying flat may develop.