Fearfulness belongs to the category of “fear syndrome” in Chinese medicine. Kidney deficiency may cause fearfulness, but fearfulness may also be related to gallbladder deficiency, liver and gallbladder deficiency, liver deficiency exposed to wind, blood deficiency, phlegm abundance and so on, and the specific cause of the disease needs to be confirmed by a Chinese medicine practitioner after diagnosis. Fear syndrome refers to the emotional symptoms mainly manifested by fear and anxiety due to excessive fear, resulting in the sinking of qi and injury to the kidneys. Clinical manifestations include fear, palpitation and insomnia, often awakened by nightmares, or even incontinence of the bowels, or seminal emission, impotence, etc. If the fear syndrome is caused by kidney deficiency, then the doctor should recognize the symptoms. If the fear syndrome is caused by kidney deficiency, then kidney yang deficiency can present with cold pain in the waist and knees, soreness and weakness, fatigue (mental exhaustion, physical weakness), fear of cold and other manifestations. Kidney yin deficiency can be characterized by soreness and pain in the waist and knees, insomnia, dizziness, heat in the heart (heat in the hearts of the hands and feet, and self-consciousness of heat in the heart and chest), and emaciation. Lack of solidity of Kidney Qi may lead to lumbar and knee weakness, fatigue, deafness and tinnitus. If you are easily scared, it is recommended to go to the hospital for diagnosis and treatment by a professional Chinese medicine practitioner in order to promote physical recovery.