Chronic illnesses can last a very long time, often for a year or even longer. You may need ongoing medical care and have difficulties doing the things you need to do every day. Chronic illnesses have disease-specific symptoms but can also bring invisible symptoms like pain, fatigue, and mood disorders. Pain and fatigue may become a frequent part of your daily life. Physical changes from your chronic illness may affect your appearance, these changes can turn a positive self-image into a poor one. When you start to not feel good about yourself, you may become withdrawn from your friends and social activities. Chronic illness can influence your ability to work as well. You might have to change the way you work to cope with certain morning issues like stiffness, decreased range of motion, and other physical limitations. Many chronic diseases and illnesses are caused by a shortlist of risk behaviors including: - Tobacco use or exposure to secondhand smoke - Poor nutrition - Lack of physical activity - Excessive alcohol use