Oliver Bee RMTRegistered Massage Therapist

Massage therapy · Kitchener–WaterlooHumerus Fracture

Neck & Shoulder

What It Is

The humerus is the long bone of the upper arm, running from the shoulder to the elbow. It can break near the top, close to the shoulder (a proximal humerus fracture), in the middle of the bone (a shaft or mid-shaft fracture), or at the lower end, where it forms the upper part of the elbow (a distal humerus fracture) (Hull University Teaching Hospitals NHS Trust, 2026; American Academy of Orthopaedic Surgeons, n.d.).

Distal humerus fractures (at the elbow end) aren't common. They account for around 2 percent of all fractures in adults (American Academy of Orthopaedic Surgeons, n.d.). The elbow is a complicated joint, and a distal humerus fracture can happen on its own or as part of a more complex elbow injury (American Academy of Orthopaedic Surgeons, n.d.).

Distal humerus fractures are usually caused by a fall directly onto the elbow, a direct blow from something hard, or landing on an outstretched arm with the elbow held tight to brace against the fall. In this last situation, the ulna (one of the forearm bones) is driven into the humerus, which causes it to break (American Academy of Orthopaedic Surgeons, n.d.).

Fractures of the top of the humerus are also reasonably common. This is the part near the humeral head, which is basically the ball of the shoulder joint (Hull University Teaching Hospitals NHS Trust, 2026).

Many of these injuries happen from a fall, including during sports. In older people whose bones have been weakened by osteoporosis, a fracture can happen even after a minor fall (American Academy of Orthopaedic Surgeons, n.d.).

Humerus Fracture Anatomy

Three bones make up the elbow joint: the humerus, ulna and radius. The elbow straightens and bends like a hinge. It is also important for rotating the forearm: the ability to turn the hand palm down or palm up (American Academy of Orthopaedic Surgeons, n.d.). The humerus connects your forearm to your shoulder. At the elbow there are three main bony parts:

  • The distal humerus is the lower end of the humerus, which forms the upper part of the elbow hinge.
  • The radial head is the knobby end of the radius. It glides along the front of the distal humerus when you bend your arm and rotates when you turn your wrist up or down.
  • The olecranon is the part of the ulna that cups the lower end of the humerus, creating a hinge for elbow movement.

(American Academy of Orthopaedic Surgeons, n.d.)

At the top end of the humerus is your shoulder joint, which is made up of a ball and socket, the ball being the humeral head, and the socket being part of the shoulder blade.

If you suspect a fractured humerus, you must go to hospital for further examination, and the doctor will usually X-ray your arm (NHS, 2026).

Not a diagnosis — for more information, contact me or another trusted healthcare provider.

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At Fearless Heart, 25 Dupont St E in Uptown Waterloo, or as a home visit across Kitchener–Waterloo.