Men’s left groin discomfort may be caused by inguinal hernia, chronic prostatitis, spermatitis, varicocele and so on. 1. Inguinal hernia: If the patient has an inguinal hernia, when the hernia sac exerts pressure on the local groin, there will be discomfort in the left groin. 2. Chronic prostatitis: if the patient has chronic prostatitis, when the condition is serious, it may cause enlargement of the prostate gland, and when it affects the vas deferens, the left groin will have pain, which will be aggravated when walking. 3. Spermatitis: If the left groin of a man is uncomfortable, it may also be caused by spermatitis, the patient’s groin area will be swollen or accompanied by pressure and pain, and the pain can be radiated to the scrotum, and the scrotum will have a sensation of swelling, and in severe cases, there will be pain in the lumbar region. 4. Varicose veins: patients may also have pain in the left groin area, and at the same time, thickened and tortuous blood vessels can be touched in the scrotum, and the symptoms may be aggravated after activities. In addition to the above factors, this symptom can not be ruled out due to other reasons, and it is recommended that patients go to regular hospitals for standardized treatment in a timely manner.