What are symptoms of artery problems? what blood test will test arteries? or only mris can?

Depends: It depends on what artery and what problem. Some arterial diseases can be detected by blood tests, e.g. temporal arteritis; risk of atherosclerosis is reflected in high sensitivity CRP. MRIs do not detect all arterial problems. You should tell your doctor your symptoms and s/he will select the appropriate test. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex, if you have sex.