Erections are hard but ejaculate easily, which is usually referred to as premature ejaculation. Premature ejaculation is usually caused by physiological reasons or pathological reasons. For example: anxiety, tension, glans, urethritis and so on. 1. Physiological reasons: when the patient anxiety, tension, depression and other adverse psychological state, will cause or aggravate premature ejaculation. Noisy environment (stomach feeling similar to hunger, emptiness with burning), the first time sex, etc. can also cause anxiety and induce premature ejaculation. 2. Pathological reasons: men suffering from phimosis, prostatitis, etc. can also cause premature ejaculation. (1) The foreskin is too long: usually, the mucous membrane of the glans is hidden under the foreskin, the mucous membrane of the glans is usually subjected to less friction and stimulation, which makes the nerve sensation of the mucous membrane of the glans too sensitive. During sex, when the glans is exposed after the penis is erected and the glans is stimulated by friction between the glans and the vagina, premature ejaculation will be triggered due to the over-sensitization of the glans mucosa nerves, leading to premature ejaculation. (2) Prostatitis: Inflammation of the prostate gland will lead to congestion and swelling of the prostate gland, causing frequent urination, urinary urgency, painful urination, incomplete urination, pain in the perineum, anus and abdomen. If sexual intercourse occurs at this time, it will further aggravate the congestion of the prostate, thus inducing premature ejaculation and premature ejaculation. (3) There are also thyroid diseases and other endocrine diseases that can trigger premature ejaculation. The causes of premature ejaculation are very many, it is recommended to go to the hospital in time to clarify the cause of the disease, and then carry out examinations under the guidance of the doctor to find out the cause of the disease.