Joanna Fortune: Does my anxious child need professional help? 

Your first step is to take time to reflect on his anxiety. How long has he been experiencing it? Do you know what might have triggered it? It is OK if you do not know the answers, as his behaviour can still be addressed without identifying the root cause

Dr Joanna Fortune: "Messy play is very effective in helping children externalise internal messy feelings."

What can I do about my 10-year-old son’s habit of touching the door frame every time he walks through it? 

If he forgets, which is rare, he has to walk through the door again. He was an anxious and clingy baby, which probably explains his behaviour. Does he need professional help?