Once premature ejaculation occurs, it is necessary to go for an examination, and there are some common sense things to be aware of in this. For example, examination of the external genitalia is very necessary to diagnose and treat premature ejaculation and to find the cause of premature ejaculation. Its focus is to check the development of the reproductive system and secondary sexual characteristics, to understand the development of the penis, whether there is any deformity, whether there is overcircumcision, whether there is prepuce or entrapment, whether the development of the penis matches the age, whether there is ectopic urethral opening, whether there is inflammation, adhesion, narrowing or cyst in the urethra. Observe the size, shape and hardness of the testicles. We also pay attention to the distribution of pubic hair and observe whether there are external genital deformities, such as hypospadias and cryptorchidism. If there are deformities, further examination of their posture, hair distribution, mammary gland development, etc. should be performed; focus on the condition of the penile corpus cavernosum, observe whether there is tenderness or hard nodules, whether there are lesions such as papules, warts or ulcers on the head of the penis, whether there is inflammation, scarring or neoplasia; and scrotal contents examination, pay attention to the size and shape of the scrotum, whether there is chronic fistula or skin adhesions, if there is scrotal enlargement, whether it is on one side or both sides, scrotal skin any acute inflammatory changes, etc. All these examinations help in the diagnosis of the disease. In addition, the determination of the location, size, morphology, and extent of intraglandular invasion of the disease facilitates the diagnosis of premature ejaculation caused by prostate disease. So in many cases, examination of the external genitalia is necessary, and checking for prostate disease is also crucial!