In most cases, knock knees don't need to be treated because the problem tends to correct itself as a child grows.
Your child doesn't need to avoid physical activity, wear supportive leg braces or shoes, or do any special exercises.
Mild knock knees that persist into adulthood don't need to be treated unless they're causing problems, such as knee pain.
Treating the underlying cause
If knock knees are caused by an underlying condition, treatment for this may be necessary. For example, rickets can be treated with vitamin D and calcium supplements.
Surgery for knock knees is rarely necessary, although it may be recommended if the condition is severe or persistent.
There are 2 main types of operation that may be carried out:
guided growth – where small metal plates are placed on the inside of the knees, which helps correct their growth over a period of around 12 months; the plates will be removed once the treatment is complete
an osteotomy – where a thin wedge of bone is removed from the leg bones so they're realigned into the correct position; plates and screws are used to fix the bones in their new position
Children with persistent knock knees who are still rapidly growing are more likely to be offered the guided growth operation. Osteotomies are mainly used for adults with severe knock knees.
Both procedures are carried out under general anaesthetic, which means you or your child will be unconscious while having the operation.
A child can usually start walking again within a few days of having a guided growth procedure and return to sports within a few weeks. It can take a few months to return to all your normal activities after having an osteotomy.