The distal interphalangeal (DIP) joints are the hinge joints located at the tips of the fingers and toes. Each finger has three phalanges (bones), while each toe has three, except for the thumb and big toe, which have two. The DIP joint connects the distal phalanx, or the bone at the tip, to the middle phalanx. These joints allow for flexion and extension, enabling movements like bending and straightening the fingers and toes. The health of the DIP joints is important for overall hand and foot function, and conditions like arthritis can affect their mobility and comfort.