Bad hygiene does not necessarily cause body odor. The unpleasant smells can be made by little things and habits that are rather small, and often people do not even notice them. Most aspects that affect the way one smells during the day include the clothes worn, food consumed, and personal care habits, among many others. Even clean people might be odor-carrying due to bacteria, fabrics, or lifestyle.
Reworn Clothes

Reusing shirts, gym clothes, or even socks without washing them will help the bacteria and sweat get stuck in the fibers of the clothes. The American Academy of Dermatology holds on the opinion that the odor is developed when bacteria start degrading sweat on clothes.
Damp Towels

If the same towel is used several times without drying out it may cause mildew and bacteria. The specialists quoted by the Cleveland Clinic clarify that wet clothes are easily turned into a home for unpleasant microorganisms.
Dirty Bottles

Unless reusable water bottles are washed regularly, they will begin to have a bad smell. Studies by the National Sanitation Foundation have discovered that certain bottles may harbor huge quantity of bacteria in case of missing the washing process.
Sweaty Shoes

Shoes can also be very smelly because they absorb moisture in the daily usage. According to the American Podiatric medical association, the bacteria flourish in inappropriately fitting warm shoes that do not get time to dry out.
Strong Foods

Digestion of foods such as garlic, onions, and some spices can affect body odor. The Mayo Clinic states that substances in these foods may be released through sweat and have an insidious effect on natural smell
Skipping Tongue Care

A large number of individuals brush their teeth and leave out cleaning their tongue, which harbours bacteria. According to the American Dental Association, bacteria present on the tongue is a significant cause of bad breath, which does not go away easily.
Synthetic Fabrics

Wearable materials composed of synthetic fabrics can entrap sweat and body smell more readily compared to breathable fabrics. According to the dermatology information presented by the American Academy of Dermatology, breathable fabrics could also be used to mitigate the accumulation of odors during day-to-day activities.
Smelly Hair

The hair is able to absorb smoke, cooking smells, and environmental odors all day long. Experts of Cleveland Clinic remark that natural oils in hair may retain adjacent fragrances unless washed on a regular basis.
Funky Gym Bags

During exercises, gym bags usually have wet clothes, footwear, and towels. According to hygiene recommendations of the Centers for Disease Control and Prevention, damp areas provide enough growth of bacteria that produce residual odors.
Stress Sweat

Sweat released due to stress may be stronger than sweat released due to exercise. Stress is known to activate glands that release compounds which are rapidly changed into smell, as research cited by the Harvard Medical School indicates.