But new research which involves a programme of exercise could provide some help to sufferers.
One school in the midlands says it has seen a remarkable improvement in pupils with dyslexia who have taken part in the new programme.
If you feel your child may be suffering from dyslexia, you should seek professional help through the school, or any of the organisations listed to the right of this page
Balsall primary in the midlands says it has seen a significant improvement in pupils who took part in exercises aimed at addressing cerebellum function of the brain.
Those pupils no longer needed remedial help, and were able to take part in mainstream classes.
The exercise programme is known as the DDAT programme, critics say it's not the only treatment for dyslexia and that success rates are not 100%.
Both The British Dyslexia Association and The Dyslexia Institute want more research into the effectiveness of the exercise method.
40 dyslexic children were selected from Balsall Primary, chosen from years 3,4, and 5.
Half had the test and half didn't - the experiment was carried out 'blind', head Trevor Davies says the results were astonishing and attracted a lot of attention.
He believes that parents and youngsters who commit to the exercise regime will see success.
The DDAT programme involves an assessment which takes into account any medical factors.
There are hundreds of different kinds of exercise which can be recommended for the dyslexia sufferer - one example involves standing on a cushion on one leg and then throwing a beanbag from one hand to the other for one minute.