Rickets (a disease caused by a lack of vitamin D).Injury of the shinbone (only one leg will be knock-kneed).Knock knees can also develop as a result of a medical problem or disease, such as: However, knock knees can very occasionally be a sign of an underlying condition that needs treatment, especially if the condition develops in older children or adults, or doesn’t improve with age. Slight knock knees can continue into adulthood, but this also isn’t usually anything to worry about unless it causes other problems. The condition is slightly more common in girls, although boys can develop it, too. Occasionally, knock knees persist into adolescence. One knee, however, may “knock” less than the other or may even remain straight. When a child has knock knees, both knees usually lean inward symmetrically. If surgery is needed, the results are most often good.ĭuring early childhood, knock-knees actually help a child to maintain balance, particularly when the child begins to walk, or if the foot rolls inward or turns outward. Children normally outgrow knock knees without treatment, unless it is caused by a disease. Knock knees is almost always just a normal part of children’s development, and their legs will normally straighten by the age of 6 or 7. Many young children have knock knees, which tend to be most obvious at around the age of 4. The alignment returns to neutral as the child grows. When the child is between 2 and 5 years old, an inward-turning (valgus) alignment is normal. Between about 18 and 24 months, this alignment normally becomes neutral. But if knock knees doesn’t appear until a child is 6 or older, it could be a sign that there is an underlying bone disease.īetween birth and 18 months, an outward-turning (varus) alignment from hip to knee to ankle is normal. It usually self-corrects by the time a child is about 7 or 8 years old. Knock knees usually becomes apparent when a child is 2 to 3 years old, and it may increase in severity until about age 4. An abnormal walking gait can also be a sign of the condition. The opposite type of alignment, called bow legs (genu varum), is when someone stands with their feet and ankles together, and there is a gap between the knees.Ī standing child of average weight whose knees touch, but whose ankles do not, is usually considered to have knock knees. Knock knees is a type of knee alignment seen when a child (or adult) stands up straight with their knees together, but their feet and ankles stay apart. Knock knees is also known as genu valgum, is when a person has a large gap between their feet when they’re standing with their knees together. Treating the underlying cause of knock knees.
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