There is no absolute answer as to whether it is good or bad for boys to wear underwear to bed. Boys sleep wear underwear should choose cotton material, soft and comfortable underwear is better. Today can play the role of isolation protection, can prevent the bed sheet bedding bacteria and other pathogenic microorganisms, into the urethra caused by infection. In addition can also play a role in protecting personal privacy. If you wear tighter underwear may lead to poor blood circulation, if the underwear of poor ventilation will make the perineum airtight, sebaceous glands and sweat glands secretion is not smooth, easy to cause the scrotum area moisture, breeding bacteria. Usually should pay attention to personal life and living, hygiene habits diligently, change underwear and take a bath diligently, avoid wearing chemical fiber underwear, avoid wearing tight clothes, so as not to cause local stimulation to affect the health of the body. If you have genitourinary diseases or sexual dysfunction, you should go to the regular hospital in time for examination, to clarify the cause of the disease, and follow the doctor’s instructions for treatment.