Reduced libido hardness may be mental psychological disorders, endocrine disorders, unhealthy living habits, penile atherosclerosis and other reasons. 1. Mental and psychological disorders: experiencing car accidents, bereavement, leaving a job and other major events such as stimulation, experiencing sexual abuse, sexual trauma, lack of sexual knowledge and experience, lack of communication between husband and wife, couple’s life is not harmonious and other factors lead to excessive mental stress, psychological trauma, so this symptom will appear. 2. Endocrine disorders: the decrease of testosterone synthesized and secreted by testes, the decrease of estrogen and progesterone secreted by ovaries, or the increase of prolactin level and other disorders of the endocrine system may cause this symptom. 3. Unhealthy living habits: long-term heavy smoking and alcoholism, having multiple sexual partners, long-term use of glucocorticosteroids, antipsychotics, and staying up late for a long time can also cause this symptom. 4. Penile atherosclerosis: long-term high blood lipid levels may cause penile arterial atherosclerotic lesions, resulting in insufficient blood supply to the penis and symptoms. Reduced libido and insufficient hardness may be related to a variety of factors, it is recommended to consult a doctor for a clear diagnosis.