Final answer:
Headache and pain are symptoms of disease, subjective experiences important for diagnosing illnesses.
Explanation:
Headache and pain are examples of symptoms of disease, which are subjective and experienced by the patient but cannot be clinically confirmed or objectively measured. These symptoms are essential in diagnosing diseases but can be challenging to quantify precisely.
Learn more about symptoms of disease here:
https://brainly.com/question/31184643
