Hi doctor my baby boy is 11 yrs old but he is lying all the time wt should I do

A. hi first ,you need to set good example infront of your child. Never argue with your child. have positive talk with your child once in a day. but don't just preach , listen your child well too. whenever your child lying , don't argue with him or don't scold your child. just have talk and correct him . don't label him that he is lyer. stay calm and positive. tell stories or give books to read which explain benefits to speak Truth.