The symptoms of darkness phobia are mainly manifested as intermittent abnormal fear of darkness, anxiety, nervousness and fear in the dark environment, and in severe cases, somatic reactions such as shivering of limbs, cold sweat, and even fainting may occur. Fear of darkness is a normal reaction common to humans, but patients with darkness phobia show a much stronger fear of darkness than most people, and will experience extreme anxiety, nervousness, and fear. Some will have shouting and even fainting, and these symptoms will disappear when they go to a well-lit place, just like normal people. This symptom can affect the patient’s mood and psychology, and affect the patient’s daily life, study and work. It is recommended that patients with dark phobia seek professional counseling and help as soon as possible, actively engage in psychotherapy or relaxation training, and if necessary, take medication under the guidance of a professional doctor to improve their symptoms.