We all have a physical body and an etheric body. The chakras in your body control and affect your spiritual and psychological condition. They also control and energize the vital organs of your physical body.
So if you are physically sick or not feeling well, it is because your chakra(s) are depleted or congested of energy. Maybe you have too much or not enough energy in that chakra that is affecting the organ that is causing you to be sick physically. Maybe the chakra has old, stuck, depleted, or dark negative energy. This needs to be cleansed out and the chakra needs to be re-energized.