What can alter your odortype? If you eat a great deal of garlic, it can impact your breath for 24-28 hours, and if you are sweating a lot, sometimes it can temporarily alter the odor of your sweat. Many people are familiar with stress-related odors. When you are stressed, you tend to secrete more apocrine from the apocrine sweat glands in your armpits. In combination with the bacteria on your skin, this milky fluid, most commonly secreted in the presence of emotional stress, can create a rather unpleasant odor. Drinking plenty of fluids, practicing good body hygiene, using appropriate deodorants, and taking appropriate steps to manage emotional stressors, can help reduce these stress-related odors. Some very rare conditions can impact one’s odortype, as well. For example, a genetic disorder known as trimethylaminuria (TMAU), which affects about 1 in 200,000 people. They don’t process trimethlamine efficiently and it tends to build up in the body, resulting in a fishy odor in urine, sweat, reproductive fluids, and breath.