Exodontocavitis, as described, is a hypothetical condition that refers to tooth cavities occurring outside the teeth or mouth. However, it is important to note that such a condition does not exist in medical terminology or scientific literature. Tooth cavities, also known as dental caries, are caused by the gradual decay of the tooth's structure due to bacterial infection and the accumulation of plaque. These cavities typically occur within the tooth, affecting the enamel, dentin, and sometimes the pulp. The concept of exodontocavitis, suggesting the presence of cavities in flesh and bones, is not recognized in medical science. Cavities are a unique occurrence within teeth and are not found in other parts of the body such as flesh or bones. In line with your description, a "black spot" on the skin may indicate a different condition, perhaps a skin lesion or mole. Black spots on the skin can have various causes, including melanoma (a type of skin cancer), benign moles, or other pigmentation disorders. These skin conditions should be evaluated and diagnosed by a healthcare professional for proper identification and treatment. Ultimately, it is crucial to rely on accurate medical information and consult a healthcare provider if any concerning symptoms or skin abnormalities are experienced.