Clinical symptoms are observable signs or reported feelings that indicate a medical condition. They can include physical manifestations, such as fever, cough, or rash, as well as subjective experiences like pain or fatigue. These symptoms help healthcare professionals diagnose and monitor illnesses. Symptoms can vary widely depending on the underlying condition. For example, diabetes may present with increased thirst and frequent urination, while depression might show symptoms like persistent sadness and loss of interest in activities. Understanding these symptoms is crucial for effective treatment and management of health issues.