When you walk, the position of your foot comes from 3 different places. All of these are reasons why your child may intoe. The most common reason actually comes from your child’s thigh!
1) The shape of the thigh bone
At birth the femur points forwards by approximately 40 degrees with relation to the hip. This is termed the femoral anteversion. As a child grows, this untwists to an adult level of around 10 – 15 degrees by the age of about 8. This happens gradually over time. It is quite common for this twist to resolve more slowly and this causes the whole leg to turn in and is the most common cause of an intoeing gait. You can imagine on yourself that if the hip is turned in then the whole leg and foot will turn in. It is termed persistent femoral anteversion and is most evident in children around the age of 2-4 years old and commonly resolves spontaneously as the child grows older and taller. Persistent femoral anteversion is more common in girls than boys and commonly runs in families. This requires no treatment as it is simply the way that person’s body is built and is one end of a normal range.
2) The shape of the lower leg/shin bone
The tibia usually has slight external rotation resulting in a slightly outward position of the foot. However, as with anything in life, there is a variation in what would be considered normal. There may be slight internal rotation of the tibia which will result in intoeing, the technical term is tibial torsion. This is typically seen in toddlers and will normally correct of its own accord by age 4-5 years old as the bones grow, walking pattern matures and the bones straighten up. No specialist input is normally necessary.
3) The shape of the foot
Occasionally a child’s foot itself may be curved. The best way to tell this is to by looking at the lateral border of their foot whilst sitting. This is usually straight but occasionally there may be a curve here and if so termed metatarsus adductus. This is an inward turning of the foot. The foot is usually fully flexible and correctable and has often been caused by the baby being cramped in the womb. Most will resolve spontaneously, if the foot appears stiffer then stretches may be suggested by a physiotherapist in the first instance. This is usually picked up when a child is fairly small, usually before they walk.