You can bend your fingers, thumbs, elbows, or knees farther than most people
Your joints move beyond the normal range of motion
You can easily make shapes or positions others cannot
Your joints may look unusually flexible or loose
You may be able to touch your thumb to your forearm
You may be able to bend your pinky finger back more than usual
You may be able to hyperextend your elbows or knees
You may be able to place your hands flat on the floor without bending your knees
You may be able to do splits or deep backbends with little effort
You may have a history of sprains, joint pain, or joint instability
A doctor or physical therapist can confirm it with a flexibility assessment