my 5 year old boy has suddenly gotten a little more extra hair patch below his knees. it's on both the knees. no other symptoms. he has been cycling for the last 3 months. is this normal in a 5 year old ? pic of both knees attached.

A. Check with your doctor because cycling has got no connection with it it is just a physical exertion that your child is having which is very good for the health of the child has nothing to do with the hair those are growing so if you want you can connect with a dermatologist