Hereditary diseases are health conditions that are passed down from parents to their children through genes. These diseases occur when there are changes or mutations in the DNA that can affect how the body functions. Common examples include cystic fibrosis, sickle cell anemia, and Huntington's disease. People with these conditions may experience various symptoms, depending on the disease. Genetic testing can help identify hereditary diseases, allowing families to understand their risks. Early diagnosis can lead to better management and treatment options. Awareness of these diseases is important for making informed health decisions and for supporting affected individuals and their families.