How is 'fluctuance' characterized in physical examinations?

Fluctuance is characterized by a movable and compressible quality. In a physical examination, this term typically refers to the sensation that is felt when palpating a mass or an area that contains fluid, such as an abscess. When pressure is applied, the fluid within the area shifts, allowing it to move under the touch and creating a wave-like sensation. This is indicative of the presence of pus or serous fluid in a cavity, distinguishing it from more solid structures that are hard and immovable, which would suggest other types of lesions or masses. Recognizing fluctuance is an important skill for medical professionals, as it helps them diagnose conditions that require interventions like drainage.