The SEND Code of Practice states that persistent disruptive or withdrawn behaviours do not necessarily mean SEN.
Where there are concerns, there should be an assessment to determine whether there are any causal factors such as:
In each case, early identification, assessment and intervention will significantly reduce the use of more costly intervention at a later date.
If all other areas of SEN have been investigated and evidenced that all interventions put in place have had little or no positive effect, then SEMH should be investigated as a specific SEN.
There is further guidance on identifying needs in:
"Children and young people may experience a wide range of social and emotional difficulties which manifest themselves in many ways. These may include becoming withdrawn or isolated as well as displaying challenging disruptive or disturbing behaviour.
These behaviours may reflect underlying mental health difficulties such as anxiety or depression, self-harming, substance misuse, eating disorders or physical symptoms that are medically unexplained. Other children and young people may have disorders such as attention deficit disorder, attention deficit hyperactive disorder or attachment disorder.”
SEN Code of Practice (6.32)