Hip Dysplasia: Symptoms, Causes & Treatment
The hip is one of the most important joints in the body. When it does not form properly, the result is discomfort, limited mobility, and joint wear over time. Whether the diagnosis is new for you or your child, understanding the condition is the first step toward the right treatment plan.
What Is Hip Dysplasia?
The hip is a ball-and-socket joint. The rounded top of the thigh bone (femur) rests inside a cup-like socket in the pelvis. In a healthy joint, the socket firmly holds the ball in place.
In hip dysplasia, the socket is too shallow to fully support the ball of the thigh bone. This improper fit makes the joint loose or unstable, and the extra stress over time damages the surrounding cartilage — often leading to early-onset osteoarthritis.
Developmental and Congenital Hip Dysplasia
Doctors often use the term developmental dysplasia of the hip (DDH) because the instability can develop as a child grows. A baby may be born with normal hips that gradually shift and become shallow during the first year of life. DDH exists on a spectrum — mild cases involve slightly loose ligaments, while severe cases see the thigh bone slip out of or fully dislocate from the socket.
When the condition is present right at birth, it is called congenital hip dysplasia. Doctors screen for it immediately after delivery and during routine paediatric check-ups so that treatment can begin as early as possible.
Risk Factors in Infants
The exact cause is not always clear, but several factors raise a baby’s likelihood of developing hip dysplasia.
- —Family history — Genetics play a strong role in joint development.
- —Breech birth — Babies positioned bottom-first in the womb experience abnormal pressure on the hips.
- —Firstborn children — The uterus is tighter during a first pregnancy, leaving less room for the baby to move.
- —Gender — Girls are significantly more likely to develop the condition than boys.
Symptoms and Visible Signs
How the condition presents depends entirely on age. Babies rarely feel pain, while adults usually seek care because of joint discomfort. Visible signs — uneven thigh creases in infants or a change in gait in older children and adults — often appear alongside the internal symptoms.
- —Leg length difference — One leg may appear shorter than the other.
- —Reduced mobility — Less flexibility on one side, often noticed during diaper changes.
- —Clunking sensation — A noticeable popping or clunking feel when moving the baby’s legs.
- —Uneven thigh creases — When the baby’s legs are gently straightened, creases on the thighs or buttocks do not line up evenly.
- —Groin or side hip pain — A deep, aching pain that worsens with physical activity or prolonged sitting.
- —Catching or snapping — A mechanical sensation inside the joint during movement.
- —Subtle limp — A change in gait, or a child who limps, waddles, or walks on the toes of one side.
- —Stiffness — Reduced range of motion as cartilage damage progresses.
How Hip Dysplasia Is Diagnosed
Early detection makes a major difference in how well the joint heals. Paediatricians perform gentle physical examinations during well-baby visits to check stability. When dysplasia is suspected, imaging confirms the diagnosis.
- —Ultrasound — The preferred tool for babies under six months. Infant bones are mostly cartilage and do not show up well on X-rays.
- —X-rays — Used for babies older than six months, older children, and adults to assess bone structure and measure the depth of the socket.
- —MRI — Reserved for adults to check for damage to the cartilage or labrum — the ring of cartilage that lines the socket.
Treatment Options
Treatment aims to secure the thigh bone in the socket so the joint can mould and grow properly. The best approach depends on the patient’s age and the severity of the dysplasia.
The most common and effective treatment is a Pavlik harness — a soft brace that gently holds the baby’s hips in a flexed, outward position. It keeps the joint aligned while the ligaments tighten and the socket forms properly. If the harness alone is not enough, a firm body cast called a spica cast may be used.
If the condition is discovered later in life, treatment becomes more complex. Mild cases may improve with physical therapy, weight management, and anti-inflammatory medication. More severe cases often require surgery — an osteotomy involves cutting and realigning the pelvic bone to create a deeper socket. For adults with severe cartilage wear and arthritis, a total hip replacement may be the best path to a pain-free life.
When to See an Orthopaedic Specialist
You should never ignore joint pain or mobility concerns. If you notice asymmetrical leg creases in your baby, or if your toddler walks with a limp, contact your paediatrician for an evaluation.
Young adults experiencing unexplained groin pain or a catching sensation in the hip should book an appointment with an orthopaedic specialist. Catching and treating the issue early helps preserve the natural hip joint and maintain an active, healthy life.
Get Expert Hip Care
Early diagnosis and an individualised treatment plan are essential for protecting the hip joint at every age. Schedule an evaluation with an experienced orthopaedic specialist to discuss your concerns and map out the right next step.
