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Ischemia is the medical term for what happens when your heart muscle doesn't get enough oxygen. Ischemia usually happens because of a shortage of blood and oxygen to the heart muscle. It is usually caused by a narrowing or blockage of one or more of the coronary arteries (which supply blood to the heart muscle). In many cases ischemia is a temporary problem.
Stress doesnât technically cause shingles, but it can cause your immune system to weaken â and a weakened immune system can put you at risk for shingles.A viral illness, shingles is caused by varicella zoster virus, the same virus that causes chickenpox.The virus lives in your body and reactivates more readily when your immune system is suppressed.f you get shingles, stress also can exacerbate your misery, by making the itching, burning, painful rash seem worse and lengthening your recovery time. Shingles and Emotional Stress. Emotional stress is considered a trigger for shingles because it has been shown to weaken the body's immune system.