What does it mean when your upper right side of your chest hurts when you move or stretch?

Pain in the right side of your chest can happen for a number of reasons, but most chest discomfort isn’t related to your heart.

Chest pain on the left side is typically associated with a heart attack. If you feel any pain on your right side, it’s most likely not related to your heart.

An anxiety disorder or extreme stress can bring on panic attacks, which can feel very similar to a heart attack. Trauma or overuse can cause muscle strain, which is one of the most common causes of pain on either side of your chest. There can be many other reasons too.

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b) the heart is a pump made of muscle and that is difficult to grow in the lab.