A chronic condition is a long-lasting disease that can be controlled but not cured. The term chronic is usually applied when the course of the disease lasts for more than three months.
Common chronic diseases include asthma, chronic obstructive pulmonary disease (COPD), cancer, and diabetes. In certain diseases or conditions, prevention is effective in reducing the possible development of the condition or its effect. Early diagnosis and timely treatment can help to reduce serious effects of the condition.