Bones & Joints · Body soundWhy joints crack
A single cracking sound during rapid joint movement.
Frequency: CommonBones & Joints
Bones & Joints · Body sound
Bones & Joints · Anatomical variationJoint hypermobility
Joints reach unusually large ranges of movement.
Frequency: Varies by individual
Bones & Joints · Anatomical variationA curved little finger
A congenital sideways curvature often affects the little finger.
Frequency: Varies by individual
Bones & Joints · Body soundSnapping hip
A snap can be felt or heard at the hip during certain movements.
Frequency: Frequency unclear
Bones & Joints · Anatomical variationAn extra bone in the foot
An additional bone fragment may lie at the inner arch of the foot.
Frequency: Varies by individual
Bones & Joints · Body soundCrepitus
A grating or rubbing sensation or sound during movement.
Frequency: Common
Bones & Joints · Anatomical variationTwo toes share a skin bridge
Adjacent fingers or toes can be partly joined from birth.
Frequency: Varies by individual
Bones & Joints · Anatomical variationThumb hyperextension
The thumb can bend far backward at its end joint.
Frequency: Varies by individual
Bones & Joints · PerceptionMorning stiffness
Joints can feel stiff at first after resting.
Frequency: Varies by individual
Bones & Joints · Anatomical variationThe kneecap has two parts
An additional bone part can remain permanently connected to the kneecap.
Frequency: Varies by individualSurprisingly quiet here.
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