Dear 1993_D_F,

You can't get crabs from wearing the same underwear three days in a row — but that doesn't mean you shouldn't change them.

It's also important to consider the kind of underwear you wear. Guys who wear too-tight underwear may lower their sperm count. And some guys who wear tight underwear may develop jock itch, which is an itchy fungus condition. It can be caused by wearing clothes that are too tight or that are made of fabrics that don't let the air circulate.

When it comes to girls, tight underwear or wearing underwear that doesn't have a cotton crotch can irritate the vulva. Although it may sound boring, wearing white, all-cotton underwear is healthiest for the vulva. Here are some other tips for keeping the vulva healthy:

• Consider going without underwear when sleeping to give the vulva some breathing room.
• Wash underwear in mild, unscented soap — detergents, bleach, and fabric softeners can cause irritation.
• Wash the vulva with water and one's hand only — soaps can dry out or irritate the vulva, and a washcloth or loofah may be too harsh.
• Avoid using fragranced products (such as perfumed shower gels) on the vulva.
• When possible, avoid wearing pantyhose, tight jeans, wet bathing suits, and tight-fitting Lycra or spandex workout clothes.

Hope this information helps!

Take care,

teenwire.com^® Editors

This column is for informational purposes only and is not intended to constitute medical advice, diagnosis, or treatment. If you have a medical problem, please call toll-free 1-800-230-PLAN for an appointment with the Planned Parenthood health center nearest you.