Nonsuicidal self-injuries (autotomy, self-inflicted destruction, self-mutilation) is a variant of autoaggression in a patient without the intent to take his/her own life. Patients with the consequences of self-injuries receive help from physicians of various specialties, who often cannot determine their motivation for autoaggressive actions, since it is associated with mental disorders. The paper presents data on phenomenology, some classifications and motivation of nonsuicidal self-injuries. Various mental disorders are noted to be the most common cause of autoaggressive behavior. The paper describes a clinical case of a female patient who has mutilated her face for a long time, hiding the cause of her autoaggressive action. A detailed clinical and psychopathological analysis of her medical history and mental status allowed for classifying hypochondriacal delirium within schizophrenia as a cause of self-mutilating actions. The motivation for this behavior was to fight against a pseudotumor, for which the patient suffered pain and prolonged suppurative processes on the skin of the face, without visiting physicians.