Definition: Caecitis is a medical condition that refers to the state of being excessively tired or exhausted. In ancient times, people often suffered from this condition because they were physically and mentally overworked, leading to exhaustion. In modern medicine, it's more common for chronic fatigue syndrome (CFS) to be defined as caecitis. This condition affects many different parts of the body and can lead to a feeling of being constantly exhausted or lacking energy. It's important to note that while CFS is