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A smelly foot is a common condition in children and adults who wear shoes on a daily basis. People with smelly feet may also suffer from sweaty feet. Most people with this condition will have sweaty and smelly feet year round, not just in the hot summer months. The odor is produced by bacteria and/or fungus that grows in the shoes and attaches to the skin. Some bacteria actually eat away the top layer of the skin, producing a foul odor. Hygiene is very important to help prevent smelly feet. Feet should be washed daily with soap and water and clean dry socks worn. Some synthetic materials used in shoes, when mixed with sweat and bacteria, can produce smelly feet. The foot and ankle surgeon will recommend one of a variety of treatments for this condition.