A psychologist can diagnose you with ADHD, or Attention Deficit Hyperactivity Disorder, for example, or OCD, or PTSD, and much more.
As the knowledgeable persons, the diagnosis is in their hands, so are the ways of therapy, price and time frame, and you are left with almost no power.
If, however, you sit with your therapist on a comfortable sofa with a lemonade and he/she asks you what, to your knowledge, makes you feel so restless, the power stays in your hands and you are treated as an "equal", as you should, for you know your life experiences better than anyone.
Also, the word "restless" is simply another, trustworthy and simple way of saying ADHD, without having to hammer you with the weight of unnecessary mystery (even if some of us are absolutely willing to be impressed).
It might therefore be a good idea to not allow anyone to frame you within a box of diagnoses, for it will be your prison and the very reason why you will not be getting better or why it will take so long.
Also, if you wash your hands a bit too often, you might have OCD, or you might simply be very demanding with hygiene, or tidiness, or security, whatever you choose to focus your attention on. That is all.
A simple difference of culture might explain your behavior, this is why, an official branch of Psychology is called "cultural psychology", for it is not the same to be talking to a middle eastern practicing muslim or christian psychologist, than to a western atheist psychologist. The service, discourse, interpretation of things and diagnosis will simply be different.
Having said that, emotions and mental reactions, like physical symptoms, are blessings that point us to the direction of where the research, or the change, needs to take place, and should NOT, under any circumstances, be considered as the problem to be erased.
"Treating" ADHD as an issue to fix, would be like a doctor focusing on trying to cover up your fever, while missing on a more important point, like a virus, for example.
Your soul needs to reach out to you, the same way your body does when it requires your attention.
Restlessness might simply be your Inner Being wanting to put you on the path of your life mission, and the more you grow in age, the more it becomes agitated and eager for you to find it. Once you will be on the "right track", restlessness will stop.
Restlessness can also mean you thought you were an indoor person that belonged in offices, while you are an outdoor being that needs nature to feel grounded, physical movements and interaction with people to be happy.
In this case, restlessness is pointing out at your limiting beliefs, in order to set you free from them.
Hear the story of Gillian Lynne for example, who was performing low at school and couldn't keep her body still. Her gift, thank God, was discovered by a benevolent and smart doctor that saw she was made to be a dancer.
She became one of the most famous and talented dancer and choreographer in the world.
Sometimes, we can "miss " our gift because not all scientists, parents, friends, or society will SEE us or understand us.
So take the risk yourself, and remember, nothing is true until you believe it.
We have to be extremely willing NOT to believe diagnosis, and pull the strength out of our heart to find our own truth, talents and ways.
I have seen the so called symptoms of a "disorder" simply vanish when people were being treated by others with love and acceptance for everyone needs to be seen as a whole trinity of body, mind and soul that cannot be considered or contemplated separately.
Please, always remain empowered...Always.