Everything in your body is connected and each emotion is processed by a specific organ. For example: When you worry about the future, it effects your spleen, and your spleen effects your heart. The resulting physical manifestation of this would be: palpitation, insomnia, poor appetite and loose stool.
Balance is the key.
Guard your peace.

The relationships among the zang-organs and the fu-organs
https://tcmwiki.com/wiki/the-relationships-among-the-zang-organs-and-the-fu-organs