The bones in your toes are called phalanges (singular: phalanx). Each foot contains 14 phalanges, making up the skeletal framework of all five toes. They’re classified as long bones despite their small size, and they come in three types depending on their position: proximal, middle, and distal.
The Three Types of Phalanges
Each of the smaller toes (second through fifth) has three phalanges stacked end to end. The proximal phalanx sits closest to the foot, connecting to the long metatarsal bones that form the midfoot. The middle phalanx sits in between. The distal phalanx is the outermost bone, forming the tip of the toe.
The big toe is the exception. It has only two phalanges: a proximal and a distal, with no middle bone. This gives it a sturdier, more compact structure, which makes sense given the outsized role it plays in movement. The math works out to 14 phalanges per foot: three in each of the four smaller toes (12) plus two in the big toe.
How Doctors Number the Toes
In medical terminology, toes are numbered 1 through 5 starting from the inside of the foot. The big toe is toe 1, also called the hallux. The little toe is toe 5. When a doctor refers to “the proximal phalanx of the third toe,” they mean the bone closest to the foot in your middle toe. This numbering system matches how fingers are counted on the hand, starting from the thumb side.
Joints Between the Toe Bones
Where toe bones meet each other or connect to the rest of the foot, they form specific joints. The metatarsophalangeal (MTP) joints sit at the base of each toe, where the proximal phalanx meets the metatarsal bone. These are the joints you feel bending when you curl your toes downward. They sit about 2 cm behind the visible web between your toes.
Between the phalanges themselves are the interphalangeal joints. The smaller toes each have two: a proximal interphalangeal joint (between the first and second bone) and a distal interphalangeal joint (between the second and third). The big toe has just one interphalangeal joint since it only has two bones.
The Sesamoid Bones
Tucked beneath the big toe joint are two small, pea-shaped bones called sesamoids. These aren’t phalanges, but they’re closely associated with the toe. They sit embedded within tendons under the ball of the foot and act as pulleys, giving the big toe extra leverage when you push off during walking or running. They also absorb weight placed on the ball of the foot, cushioning the first metatarsal bone during every step, jump, and landing.
Why the Big Toe Matters Most
The big toe’s two phalanges carry a remarkable amount of responsibility. In standing, the hallux exerts more pressure than all five metatarsal heads and the heel, generating twice the pressure of the other four toes combined. It’s the foot’s primary stabilizer.
During walking, the big toe drives what’s known as the windlass mechanism. As the toe bends upward before push-off, it tightens the band of tissue along the sole of your foot, raising the arch and turning the foot into a rigid lever. This creates the force that propels you forward. When this mechanism is disrupted, the timing and power of push-off suffer.
Balance depends heavily on the big toe as well. Research from the Journal of Orthopaedic Research found that when the big toe was restrained, subjects swayed significantly more during single-leg standing, whether their eyes were open or closed. Their ability to shift weight forward and backward also deteriorated. The big toe primarily controls the accuracy of balance adjustments rather than speed, which is why its loss or impairment affects coordination in specific directional patterns, particularly forward and diagonal movements.
Common Toe Bone Injuries
The proximal phalanx is the most frequently fractured bone in the toe. Because it’s the longest of the three phalanges, it absorbs more force during impact. Toe fractures fall into two broad categories: nondisplaced fractures, where the bone cracks but the pieces stay aligned, and displaced fractures, where the broken ends shift out of position. A displaced fracture is more likely to need medical intervention to realign the bone.
Stress fractures can also develop in the metatarsal bones just behind the toes. These start as tiny surface cracks that gradually deepen over time, often from repetitive activity rather than a single injury. The fifth metatarsal, connected to the little toe, is particularly vulnerable. An avulsion fracture occurs there when a ligament yanks a chip of bone away from the base, while a Jones fracture is a horizontal break at the same location that frequently requires surgery due to poor blood supply in that area.
Sesamoid bones under the big toe can also fracture or become inflamed, causing pain in the ball of the foot that worsens with pushing off or bending the big toe upward.