Although some people may ask for help, sometimes self-injury is discovered by family members or friends. Or a doctor doing a routine medical exam may notice signs, such as scars or fresh injuries.
There's no diagnostic test for self-injury. Diagnosis is based on a physical and mental evaluation. A diagnosis may require evaluation by a mental health provider with experience in treating self-injury.
A mental health provider may also evaluate you for other mental illnesses that may be linked to self-injury, such as depression or personality disorders. If that's the case, evaluation may include additional tools, such as questionnaires or psychological tests.