Internal diseases are illnesses that affect the major organs and systems of the body. These diseases can have a wide range of causes, including genetic factors, lifestyle choices, environmental exposures, and infections. Common internal diseases include heart disease, cancer, diabetes, and respiratory illnesses. Research into the causes and treatments of internal diseases is ongoing, and new developments in medical technology are helping to better diagnose and treat these conditions. News articles and videos about internal diseases provide the latest updates on treatments and research findings.