Raising Kids Big Kids Hygiene When do children begin to sweat and have body odor? By Parents Editors Published on July 2, 2015 Share Tweet Pin Email Q: When do children begin to sweat and have body odor? A: It may surprise you to learn that an increase in sweating—and the inevitable potential for BO—starts before puberty, usually between 8 and 10. Once these changes begin to take place, you can help your child prevent BO by teaching and encouraging good hygiene habits, including: • Taking a bath or showering every morning to limit the bacteria on the skin, which makes sweat smell • Taking a second bath or shower after sports or vigorous exercise • Paying special attention to areas like the armpits, genitals, and feet when they wash • Wearing clean underwear and socks each day • Using deodorant on a daily basis starting around age 10 or 11 Answered by Parents.com-Team Was this page helpful? Thanks for your feedback! Tell us why! Other Submit