If the testicles are sometimes vaguely swollen and painful, then a visit to the hospital is recommended if necessary to assess whether the testicles and scrotum are suffering from related diseases.1. If there are factors such as strenuous activity, prolonged urine holding, or prolonged standing, then vague pain in the testicles may occur, but all can be relieved after rest. There is no obvious swelling in the appearance of the testicles, and no hard nodes or enlargement are found when touched by hand, etc. Generally, it does not need any treatment, only moderate rest, avoid drinking alcohol, and then go to the hospital for examination if necessary. 2. If you have varicocele, you can have discomfort of hidden pain in the testicles. Usually it can be relieved after rest, but it can be aggravated after long time standing or activity. The scrotum is mildly swollen and the thickened varicose blood vessels can be touched by hand. Ultrasound examination of the spermatic cord is required, and if varicocele is diagnosed, oral medication or surgery may be an option.