I am a 59-year-old woman. A month ago I had a comprehensive, four-hour wellness exam (with every known test to man). I was told I am in excellent health. I am on no medications and have had no major illnesses or operations in my lifetime. I have never smoked or taken drugs. My blood pressure has always been low or normal. Today my entire left arm became very tight. The area in my left arm in the crease (elbow bend) is in continual pain (this is where the vein is that is always used when I give blood). Not sure if I should be concerned or just take aspirin? The rest of my body feels just fine.