There can be different reasons for bow legs - including vitamin D deficiency, degenerative changes in the knees or issues with your hips. Sometimes when you have an anatomical change, there can be associated weaknesses/tightness in muscle groups.
If you are having problems with gait, balance, your work or sporting activities, it is worth getting it assessed. Equally, if you are experiencing pain symptoms, this might require an assessment.
I would suggest seeing a Sports/MSK physician or physiotherapist in the first instance. They can assess you clinically, advise on conservative treatments, organise investigations and then if needed refer you onwards appropriately.
I hope this helps.
BW
Dr Dinesh
