>>1772People cut for a variety of reasons, but an extremely common one is that it offers a form of escapism. The pain can be a temporary distraction from more stressful problems.
>>1779I'd start by seeing a therapist. A psychiatrist is more for if you need medication, like anti-depressants, mood stabilizers, anti-psychotics, etc. And maybe you do need some form of medication to help treat your symptoms.
But a therapist will try and help you develop coping techniques that don't involve a trip to the drug store, which seems like a more favorable option to me whenever possible.