A person who intentionally cuts themselves is often referred to as a self-harmer or someone who engages in self-injury. This behavior is usually a coping mechanism for dealing with emotional pain or distress. It's important for individuals who self-harm to seek professional help to address the underlying issues causing this behavior.
barber
a gardener
a person who cuts and polishes gems is called a gemcutteror a lapidary (sometimes lapidarist).
LUMBERJACK
Specialists in meat, including cold cuts, are classified as butchers.
nail technician
A Narcissist
You could call this person a "selfish immortal."
most people would call them emo's but really they just have a problem most are afraid of loosing control of their life so they cut because it over whelms them but the correct answer for this would be a Philafeamyaphobic any more questions :)
A person who cuts up dead people for medical examination and investigation is called a forensic pathologist or a medical examiner.
Self mutilation is the medical term for the act. Terms used to refer to the person are "self-mutilator", "self-harmer," or "self-injurer". A slang term often heard is "cutter" or a person who "cuts". But the person should not be defined by the act. Those terms to refer to the person are used less often than the term to describe the act itself. It is a symptom of an underlying problem that is causing distress.
Hypochondriac