In medical terminology, a symptom is a subjective experience or sensation reported by a patient that may indicate disease or condition, as distinguished from signs which are objective findings observable by healthcare providers. Common symptoms include pain, fatigue, nausea, dizziness, and shortness of breath. Patients describe symptoms to healthcare providers who use this information along with observable signs, medical history, and diagnostic tests to determine diagnoses. Symptom severity, duration, and pattern help identify conditions. Some conditions are primarily diagnosed based on symptom reports (like migraines), while others require objective testing. Effective communication of symptoms helps patients receive appropriate care. Symptom checkers and triage tools help people assess when to seek medical attention.