A 24 year old man found dead at his Longridge flat had more than 120 self-inflicted stab, puncture and incised wounds on his body.
Blackburn magistrates heard that Matthew James Barker's mother discovered his mutilated body on the floor of his living room.
And a police officer later found a bath three quarters full of blood and water.
The inquest heard that Matthew, of Berry Lane, suffered from paranoid schizophrenia which had first been diagnosed when he was just 16 years old.
His mother, Sandra Barker, said Matthew had moved to Longridge to be nearer to her. When he lived in Clayton-le-Woods she had seen him four or five times a week but when he moved he cut off all contact with her.
Mrs Barker said she eventually went to the flat because she hadn't seen or heard from her son for some time.
The medical cause of death was given as multiple stab and incised wounds and coroner Michael Singleton recorded a verdict that Matthew killed himself while the balance of his mind was disturbed.