Chronic diseases refer to those conditions that often last for three months or more, and have the potential to get worse with time. These diseases are more common in older people, and can typically be managed but not cured. Diabetes, cancer, stroke, arthritis and heart diseases are the most common types of chronic diseases. These diseases have symptoms specific to the disease, but can also cause subtle symptoms like mood disorders, pain and exhaustion. Several chronic diseases are caused by a combination of risk factors, such as physical inactivity, tobacco use, excessive alcohol consumption and poor nutrition. Chronic diseases can be treated in a variety of ways including psychological therapy, surgery, radiotherapy and physical therapy. However, the use of medication is the most prevalent therapeutic method. This book explores all the important aspects of chronic diseases in the modern day. It provides significant information for clinicians to help develop a good understanding of these diseases.