There is no evidence that bloodsickness can be hereditary. Bloodsickness is one of the phobias and is generally not hereditary. Blood phobia refers to the phenomenon of unconsciousness after seeing blood, the main manifestations are nausea, dizziness, vomiting, fainting, appearing pale, cold hands and feet, lowered blood pressure and other symptoms, and even suddenly lost consciousness, generally can recover by themselves, and the serious cases need to be rescued and treated. In addition to the fear of fresh blood, other people are no different from normal people. This is a psychosomatic disease, one of the phobias, and is generally not hereditary. Bloodsickness can be improved to a certain extent with the right treatment, and it is recommended to consult a doctor in time for the appropriate treatment.