Limbs & Joints Symptoms in Babies

Bowed legs (genu varum) — where the knees curve outward when standing with feet together — are a normal part of development in babies and toddlers. Almost all babies are born with some degree of bowing due to their folded position in the womb. This typically straightens by age 18-24 months and may even transition to mild knock-knees by age 3-4. Persistent, worsening, or asymmetric bowing may need evaluation.

Hip clicking, clunking, or instability in babies can be a sign of developmental dysplasia of the hip (DDH), where the hip joint does not develop properly and the ball does not sit securely in the socket. Soft clicks from ligaments/tendons are common and benign, but a distinct "clunk" (the feeling of a joint moving in or out) needs urgent evaluation. DDH affects approximately 1-3% of newborns and is best treated early — ideally in the first 6 weeks of life with a Pavlik harness.

Growing pains are a common cause of recurrent leg pain in children, affecting 10-35% of children aged 3-12 years. Despite the name, they are not actually caused by growth. They typically present as bilateral (both legs), deep aching pain in the thighs, shins, or calves, occurring in the late afternoon or evening and often waking the child at night. The child is completely fine by morning with normal activity, and physical examination and tests are normal.

In-toeing (pigeon toes) occurs when a child's feet point inward rather than straight ahead when walking. It is one of the most common orthopedic concerns parents bring to pediatricians and is almost always a normal variant that self-corrects with growth. The three causes are: metatarsus adductus (foot curved inward), internal tibial torsion (shin bone rotated), and femoral anteversion (thigh bone rotated). The vast majority resolve without treatment by age 8-10.

Limping in a young child means an abnormal gait pattern — favoring one leg, refusing to bear weight, or walking differently than usual. In toddlers, the most common cause is a "toddler's fracture" (a spiral fracture of the tibia from a minor twist/fall) or transient synovitis (irritable hip after a viral illness). Any new limp in a child should be evaluated, as it can indicate injuries, infections, or other conditions requiring treatment.

When a baby or toddler suddenly stops using one arm, the most common cause is nursemaid's elbow (radial head subluxation) — a partial dislocation of the elbow joint that occurs when the arm is pulled or jerked. It is extremely common in children under 5 and is easily treated with a quick reduction maneuver by a healthcare provider. Other causes include fractures, soft tissue injuries, or rarely infections.

A swollen joint in a baby or toddler — characterized by visible swelling, warmth, redness, or reduced movement of a joint — always requires medical evaluation. The most important distinction is between septic arthritis (bacterial joint infection, a surgical emergency) and reactive/inflammatory causes. A hot, swollen joint with fever in a child who will not weight-bear is septic arthritis until proven otherwise.

Toe walking (walking on tiptoes) is common when children first start walking and is usually a normal phase that resolves by age 2-3. It is called "idiopathic toe walking" when no underlying cause is found. However, persistent toe walking beyond age 2, or toe walking that is always present (never flat-footed), may indicate tight Achilles tendons, sensory processing issues, cerebral palsy, or muscular dystrophy and warrants evaluation.