Poor hygiene doesn't cause blemishes, but practicing good hygiene can help prevent them. Showering daily can aid in keeping your skin clean and free of bacteria. It's especially important to bathe after exercise or any other sweaty activities. Use mild a body wash and lukewarm water, and make sure you do a thorough job.
While cleansing is essential, you have to be gentle. Showering too frequently, scrubbing too hard, bathing in hot water and using harsh antibacterial soaps can actually make your skin worse [source: American Academy of Dermatology].